Patterned variation in prehistoric chiefdomsRobert D. Drennan* and Christian E. Peterson

Department of Anthropology, University of Pittsburgh, Pittsburgh, PA 15260

This contribution is part of the special series of Inaugural Articles by members of the National Academy of Sciences elected on April 20, 2004.

Contributed by Robert D. Drennan, December 21, 2005

Comparative study of early complex societies (chiefdoms) conjuresvisions of a cultural evolutionary emphasis on similarities andsocietal typology. Variation within the group has not been assystematically examined but offers an even more productive av-enue of approach to fundamental principles of organization andchange. Three widely separated trajectories of early chiefdomdevelopment are compared here: the Valley of Oaxaca (Mexico),the Alto Magdalena (Colombia), and Northeast China. Archaeolog-ical data from all three regions are analyzed with the same tools toreveal variation in human activities, relationships, and interactionsas these change in the emergence of chiefly communities. Pattern-ing in this variation suggests the operation of underlying generalprinciples, which are offered as hypotheses that merit furtherinvestigation and evaluation in comparative study of a much largernumber of cases.

comparative study � social hierarchy

Supralocal communities organized around institutionalizedsocial inequalities emerged repeatedly and independently

around the world between about 1,000 and 7,000 years ago. Theearliest such societies, often broadly labeled chiefdoms, fre-quently, but not always, came into existence after the establish-ment of sedentary agricultural living. This fundamental trans-formation in human social organization was speculated about bymid-19th-century cultural evolutionists on the basis of compar-ative ethnography, and it has been more directly documented byarchaeological research since the mid-20th century. Compara-tive study has drawn heavily on earlier cultural evolutionarywork, sharing its focus on similarities and universals. Hierarchi-cal relationships, of course, have deep roots in dominancebehavior in the human (and other) species, and the institution-alization of such relationships provides effective organization,especially at large social scales. That such institutions haveappeared repeatedly in human history is no surprise, but we donot fully understand just how they came to emerge when andwhere they did, and not in other times and places. We are alsoincreasingly aware that early chiefdom communities did not alltake the same form and did not all emerge in the same way.There are indications that this variation is not just idiosyncraticdetail, and that comparative study of its patterning can provideinsight into the developmental dynamics of institutionalizedsocial hierarchy. Ironically, the very richness of information thathas brought about this realization is itself an impediment toeffective comparative study, which finally will need to draw onthe social trajectories of dozens of regions. When a recentcomparison of seven early civilizations runs over 750 pages, onedespairs of ever seeing the forest for the trees. Here, we look atthree regions, focusing on changing activities, relationships, andinteractions in human communities where inequalities emergedand became institutionalized.

Interdependence Within Chiefly Communities in Oaxaca,Mexico, During the First Millennium B.C.Anthropologists have often studied villages—small local com-munities of people in daily face-to-face interaction—and archae-ologists are accustomed to thinking of early sedentary agricul-tural living as organized into just such villages. The Rosario

phase (700–500 B.C.) occupation of the Valley of Oaxaca,Mexico, for example, consisted of about 65 such village com-munities in an area of 2,125 km2 that were surveyed systemat-ically (1–4). Most of these communities had fewer than 50inhabitants, but one, San Jose Mogote, had a population of morethan 500. Small villages had been the norm in Oaxaca since thebeginning of sedentary life about 1500 B.C. They consisted ofaround 10 nuclear families whose small thatch-roofed wattle-and-daub houses were scattered across 1 or 2 ha at intervals of20–50 m. Households are easy to identify in the archaeologicalrecord from the remains of structures, hearths, middens, andpits, and their activities are easy to reconstruct from associatedartifacts and ecofacts. These activities include subsistence andhousehold maintenance tasks carried out by virtually all familiesas well as a number of possibly specialized crafts (5, 6). Amultidimensional scaling of 10 households at Fabrica San Jose,a Late Guadalupe phase (800–700 B.C.) village (7), shows fivegrouped tightly together (Fig. 1). These households have evi-dence of only basic domestic activities. Four others are set offfrom this group by the presence of distinctly different sets oftools related to different crafts. Such specialization meanseconomic interdependence and a level of daily interaction thatwould have strengthened the forces that pulled these 10 house-holds together into a compact community in the first place.Fabrica San Jose seems typical of small villages in Oaxaca, notonly during the Guadalupe phase, but also during the precedingSan Jose phase (1200–900 B.C.).

In addition to economic interdependence, social inequality isa second major axis of variability in Fig. 1. One household is setoff sharply from all of the rest in this regard; its members hadmany decorated serving vessels, ate considerably more deermeat, and owned more elaborate ornamental possessions thantheir neighbors. A 60-year-old woman of this household wasburied with four ceramic vessels and 55 polished stone beads—much more elaborate treatment than any other burial excavatedat the site. Three of the four craft specialist households also hadsomewhat elevated ranks on this social scale. The locations ofhigher status households at Fabrica San Jose show enoughconsistency through time to suggest a degree of institutionaliza-tion or at least heritability of status. In some villages, higher-status residential compounds were more elaborate, includingfeatures such as the San Jose phase 1-m-high stone and adobeplatform at Tomaltepec (8).

In addition to its much larger population, the community atSan Jose Mogote differed from these small villages in severalways (6, 9). Household economic specialization was more ex-tensive, including a larger variety of crafts, although initiallyhigher status residences were no more impressive than those ofsmall villages. San Jose Mogote also had non-residential struc-tures from the time of its founding. By San Jose and Guadalupephase times these took the form of plastered platforms withwattle-and-daub structures for public or ceremonial activities.

Conflict of interest statement: No conflicts declared.

See accompanying Profile on page 3957.

*To whom correspondence should be addressed. E-mail: drennan@pitt.edu.

© 2006 by The National Academy of Sciences of the USA

3960–3967 � PNAS � March 14, 2006 � vol. 103 � no. 11 www.pnas.org�cgi�doi�10.1073�pnas.0510862103

Dow

nloa

ded

by g

uest

on

Aug

ust 1

9, 2

020

True temples of much more monumental proportions appearedin the Rosario phase.

Rosario phase San Jose Mogote thus fits the archaeologicaldescription of a central place—the nexus of a larger web of socialinteraction. The application of distance-interaction principles toa smoothed plot of the distribution of Rosario phase occupationon the Oaxaca landscape (Fig. 2) permits the delineation of thatweb in the form of a district that incorporates 28 villages withinabout 12 km of San Jose Mogote (1, 2). None of these villageshas produced any evidence of the kind of monumental-scalepublic buildings or residences known for Rosario phase San JoseMogote. Participation in ceremonial activities at San Jose Mog-ote’s public buildings was clearly one form of social interactionthat produced this district, and this activity was closely associatedwith the presence at San Jose Mogote of the region’s most elitefamilies. It was in this context of stable intercommunity inter-action that households at the small village of Fabrica San Josebegan to specialize in the production of salt, presumably fordistribution to other local communities, since this resource wasnot widely available. Small communities may also have acquiredsome goods produced by San Jose Mogote’s greater diversity ofcraft specialists. With unique ceremonial activities and thedistrict’s highest ranking families at San Jose Mogote, its rela-tionships with the small villages were clearly asymmetrical,forming a hierarchically structured regional-scale communitycomposed of village building blocks. In similar fashion, theinternal organization of the central place relied on residentialwards not unlike a set of villages pulled very tightly together bymore intense interaction. Like the outlying villages in the district,these wards interacted through their hierarchical social relationswith San Jose Mogote elites and participation in ceremonialactivities at the center’s public buildings, but it is at this local

scale that the economic interaction from complementary eco-nomic specializations seems particularly important.

The San Jose Mogote chiefdom was constituted in theseactivities, relationships, and interactions, and this communityrepresents the largest scale of such interaction at the time inOaxaca. Other supralocal communities were much smaller; theSan Jose Mogote chiefdom contained some two-thirds of theentire regional population. The economic interactions of house-holds in local communities and the complementary specializa-tions of wards at San Jose Mogote are detectable as early as 1200B.C. in the San Jose phase. Social ranking began by the sametime and grew stronger up through the Rosario phase. Duringthe Guadalupe phase, there were public buildings at San JoseMogote as well as at potentially rival centers, but the activitiesfor which they were constructed became highly centralized atSan Jose Mogote in the Rosario phase. In Oaxaca, the regional-scale chiefly community depended heavily on social and cere-monial interaction for integration. The economic component ofcommunity interaction was particularly well developed at thelocal scale, both at small villages and at the large local commu-nity of San Jose Mogote.

Ceremonial Chiefly Centers in the Alto Magdalena, Colombia,During the First Millennium A.D.Regional-scale chiefly communities are also visible on thelandscape in the Alto Magdalena of the Colombian Andes. Asmoothed density plot representing Regional Classic (A.D.1–900) period occupation in a completely surveyed area of 317km2 in the Valle de la Plata (10, 11) shows four districts (Fig. 3).The two chiefdoms that are relatively complete in Fig. 3 areroughly half the size of the San Jose Mogote district, although,at perhaps as many as 7,000 inhabitants, their populations werethree or four times that of the San Jose Mogote district. Thissurvey area is only part of a much larger zone containingprobably 20 or more such districts of roughly similar size, focusedaround complexes of funerary monuments. In each complex, thecentral elements are the burials of single individuals in stone slabtombs, covered by earthen mounds up to about 4 m high (Fig. 4).The overall impact of the Alto Magdalena’s monuments is tofocus attention strongly on these specific individuals (12), whomay well be represented in the large sculptures incorporated intothe barrows and the plazas adjoining them. The sculpturescombine human and animal characteristics in clearly supernat-ural references, as in human faces with fangs or two-headedreptiles on the backs of human figures (Fig. 4). These themesrecall ethnographically known shamanic beliefs in supernaturalpower involving human–animal transformations (13). The mon-ument complexes range from small (a single mound and a fewstatues) to large (several large mounds and dozens of statues onadjacent hilltops) and are widely distributed across the Alto

Fig. 1. Scaling of artifact assemblages from 10 Late Guadalupe phasehouseholds at Fabrica San Jose (Oaxaca), based on quantities of bowls, jars,ceramic decoration, figurines, animal bone (especially deer), flaked stone(especially obsidian), ornaments (shell, mica, polished stone), and tools anddebris from craft production. Evidence of salt production, found in severalhouseholds, was especially abundant in LG4.

Fig. 2. Smoothed plot of Rosario occupation in the Valley of Oaxaca. Theflanks of the San Jose Mogote peak ‘‘capture’’ outlying smaller villages to forma regional-scale district (red line). Supralocal clustering elsewhere is minimal.

Fig. 3. Smoothed plot of Regional Classic occupation in the Alto Magdalena.The region is easily divided into several districts of similar size (red lines), eachcentered on a monumental burial complex.

Drennan and Peterson PNAS � March 14, 2006 � vol. 103 � no. 11 � 3961

AN

THRO

POLO

GY

INA

UG

URA

LA

RTIC

LE

Dow

nloa

ded

by g

uest

on

Aug

ust 1

9, 2

020

Magdalena. The ceremonial activities carried out at the monu-ments and the hierarchical social relationships they express soconspicuously seem the central elements in regional-scale socialintegration. The multiple regional-scale chiefly communities ofthe Alto Magdalena are, in this respect, very much like the loneSan Jose Mogote district in Oaxaca.

There are, nonetheless, important differences between thetwo regions in the nature of ceremonial activities and the way inwhich social hierarchy is expressed. It is in ritual that socialinequalities are most strongly expressed in the Alto Magdalena,since principal ceremonies apparently consisted of rituals per-formed at funerary monuments, continually reemphasizing theimportance of specific individuals. Oaxaca public buildings alsocreated ceremonial spaces, but they were not, in their veryessence, monuments to particular people, even though eliteresidences were close at hand. When, late in the Oaxaca se-quence, monumental sculpture appeared, it depicted not elitesor supernatural themes, but rather the unfortunate victim ofpolitical violence (9). A naked and bleeding sacrificial victimcarved in relief on a stone slab formed a threshold to be trodupon by those approaching San Jose Mogote’s public buildings(Fig. 5).

A stronger contrast is the relative weakness in the AltoMagdalena of the economic component to interaction thatloomed so large locally in Oaxaca. Households of different ranksand specializations can be identified in the Alto Magdalena bytheir artifact assemblages, but these differences are quite smallby comparison to Oaxaca. Artifacts related to such differentia-

tion are much more abundant in Oaxaca. In a sample of San Josephase households at San Jose Mogote, 299 status-related arti-facts were recovered for every 100,000 sherds (6). In theGuadalupe and Rosario phase households at the peripheralvillage of Fabrica San Jose, there were 224 (7). Assemblagesfrom communities around four of the Alto Magdalena’s mostimpressive monumental centers, however, yielded only fourstatus-related artifacts for every 100,000 sherds, reflecting onlythe most modest differences in standard of living betweenhouseholds. Higher-ranking families in the Alto Magdalena didnot live in much larger or more elaborate houses, as they did inOaxaca. Craft specialization was present in the Alto Magdalena,but there were only 17 craft-related artifacts for every 100,000sherds, compared with 338 at Fabrica San Jose and 972 at SanJose Mogote. The greater heterogeneity of Oaxaca households,particularly with regard to craft activities, would have involvedsubstantially more intense local interaction—the interaction thatformed Oaxaca’s compact early villages. At the local scale, theAlto Magdalena presents a very different picture. It has beenargued (1, 2) that Regional Classic occupation is not comprisedof separate compact villages at all, but rather of widely scatteredindividual households, probably living directly adjacent to thelands they cultivated. The weaker development of specializationin the Alto Magdalena would have meant less intense localinteraction, and this, in turn, could have produced this patternof very dispersed residence without village formation.

Economic and Symbolic Hierarchies in Northeast ChinaDuring the Fourth Millennium B.C.The local community pattern for the Hongshan culture area inNortheast China is much more like that of the Valley of Oaxacathan the Alto Magdalena. For a systematically surveyed zone of783 km2 in the Chifeng region (14, 15), it is easy to delineate avillage pattern similar to that of Oaxaca in Hongshan occupation(4500–3000 B.C.) (1, 2). Hongshan villages, like those of Oaxaca,ranged from only a few households up to over 500 inhabitants.Unlike the lone large village at San Jose Mogote, however, theChifeng region contained at least a half-dozen with populationsover 200. No one stands out as dramatically larger than all of therest. Chifeng villages of all sizes, though, were considerably lesscompact than their Oaxaca counterparts. The Chifeng Hongshanvillage of Fushanzhuang, for example, had some 35–40 house-holds in an area of about 50 ha—a clearly defined villagecommunity, but one spread across 10 times the area that aOaxaca village of comparable population might cover. Subtledifferences in the assemblages of lithic tools associated withdifferent households at Fushanzhuang indicate different kindsand degrees of specialization (Fig. 6), but the distinctionsbetween households are less marked than those in Oaxaca.Fushanzhuang yielded a total of 131 craft-related artifacts forevery 100,000 sherds recovered, a value nearly eight times thatfor the Alto Magdalena but still well below those calculated forOaxaca communities. This evidence is entirely consistent withthe notion that Hongshan villages, like Oaxaca villages, wereproducts of specialized local economies. It also appears that themore intensive interaction patterns that result from a greaterdegree of economic interdependence between households playa role in the much greater compactness of Oaxaca villages.

At Fushanzhuang, some households have higher proportionsthan others do of ornamental luxury items, of fine servingvessels, and of incised, painted, or burnished pottery. There isconsiderable variation along a scale from low to high, as inOaxaca villages. Higher-status households are differentiatedfrom lower-status ones to a similar degree in both regions, buta much higher proportion of Fushanzhuang households fall nearthe bottom of the social scale. As a consequence, the overallabundance of status-related artifacts at Fushanzhuang (at 39 per100,000 sherds) is much less than that calculated for Oaxaca

Fig. 4. Monumental tomb in the Alto Magdalena (Left) and statue of nakedman with fangs and two-headed reptile on his back (Right).

Fig. 5. Relief carving of sacrificial victim from San Jose Mogote.

3962 � www.pnas.org�cgi�doi�10.1073�pnas.0510862103 Drennan and Peterson

Dow

nloa

ded

by g

uest

on

Aug

ust 1

9, 2

020

communities. Most excavated Hongshan residences are less than20 m2; at least one was over 100 m2, but all are single-roomstructures and none was raised on a platform. Hongshan house-holds, then, display differences in the material conditions of dailylife, although such disparities were greater in Oaxaca commu-nities, and a larger proportion of Oaxaca households enjoyedelevated standards of living. By contrast, evidence for theexpression in daily life of differences in wealth or status isextremely scarce in the Alto Magdalena.

Both economic specialization and social ranking, then, areeasily recognized in the archeological evidence of village life atFushanzhuang, although both are more conspicuous in Oaxacacommunities. There is little sign at Fushanzhuang of the con-nection between economic specialization and social status seenin Oaxaca. Thus, of the three cases compared here, it is in theearly chiefdoms of Oaxaca where both craft specialization andthe economic aspect of social ranking are not only most highlydeveloped but also most strongly linked to each other, and wherelocal communities are most clearly defined and nucleated.Hongshan local communities, although easy to delineate, are lessnucleated; both craft activity and differences in standards ofliving figure less prominently and seem unconnected to eachother. In the Alto Magdalena, with its very dispersed residencepattern, craft specialization is still less developed, and theeconomic component of social differentiation is weakest.

A smoothed density plot of Hongshan occupation in Chifeng(Fig. 7) clearly shows a number of larger-scale communities.

Most of the large villages like Fushanzhuang form peaks whoselower slopes incorporate other nearby villages into districts,along the lines of Oaxaca. The dozen or so districts havepopulations generally numbering in the hundreds in an area nomore than 3 km across, making these chiefdoms the smallest,both demographically and spatially, of any of the three regions.There is no indication, however, of any chiefdom substantiallylarger than its potential rivals or of any sociopolitical integrationat a scale larger than these districts. Ceremonial activity mayhave, once again, been an important element in district-scalesocial interaction. At Fushanzhuang, for example, there areremains of at least four ceremonial constructions. No suchstructures have been excavated in the Chifeng region, but theyhave been investigated in detail in other parts of the Hongshanculture area, as at Niuheliang (16, 17). They consist of square orcircular earthen stone-faced platforms of varying dimensions,usually 1–2 m high and up to about 25 m across (Fig. 8), althoughlarger examples are known. Hundreds of 1-m-tall painted pot-tery cylinders might be incorporated into the platform construc-tion. These open-ended cylinders were not containers and onlyoccur in platform contexts. Unbaked clay figurines, usuallyfemale, and sometimes pregnant, are occasionally found inplatform fill. Ceremonial, or at least public, activities performedatop these platforms would have been visible to sizeable crowdsassembled around them. Occasional examples are alone on thelandscape, but they more often occur as complexes of severalplatforms.

Most platforms have a large stone slab tomb in the center, andother tombs (up to a half-dozen) may be arranged around it.These burials contain elaborate jade carvings (Fig. 8) of birds,turtles, insects, and other animals, as well as supernatural themessuch as pig-dragons (18). Most Hongshan villagers were buriedwithout offerings in village cemeteries, but graves not in plat-forms were sometimes lined with stone slabs or had artifacts. AtNantaizi, for example, one burial contained jade earrings, a shellornament, and a stone chisel; and another, three bone tools, aceramic bowl, two incised ceramic jars, a grinding stone, and ashovel, an axe, and a knife of stone (19). Large jade carvings, onthe other hand, are almost exclusive to platform burials, wherethey are typically the only kind of offering included. These twodifferent sets of burials (platform and non-platform) both reflecthierarchical elements in Hongshan society, but they trade indifferent currencies. Non-platform burials, with their varyingquantities of tools and ornaments, seem connected to thevariation in material standard of living seen in Hongshanresidential architecture and artifact assemblages. Platformgraves and their jades, on the other hand, are not obviouslyrelated to the material conditions of life. Their currency is noteconomic but symbolic (20). The occupants of these tombs werea special group of people, set off from the rest of the population

Fig. 6. Scaling of lithic assemblages from 19 Hongshan households atFushanzhuang (Chifeng), based on proportions of formal lithic tools. Ordinaryhouseholds carried out agricultural and craft activities; others focused espe-cially heavily on farming, on initial stone tool production, or on tool finishing.

Fig. 7. Smoothed plot of Hongshan occupation in Chifeng. Tall peaksrepresent larger communities, some ‘‘capturing’’ outlying small villages toform districts (red lines).

Fig. 8. Hongshan platform at Niuheliang (Left) and central burial withcarved jades from another platform (Right). [Reprinted with permission fromref. 17 (Copyright 2004, Liaoning Sheng Wenwu Kaogu Yanjiusuo).]

Drennan and Peterson PNAS � March 14, 2006 � vol. 103 � no. 11 � 3963

AN

THRO

POLO

GY

INA

UG

URA

LA

RTIC

LE

Dow

nloa

ded

by g

uest

on

Aug

ust 1

9, 2

020

by their connection to the supernatural. They were not justwell-to-do villagers, but shamans or some sort of leader withgreat spiritual power—like chiefs are often thought to have. Thedistinction between two different (although not necessarilyunrelated) social hierarchies is clear.

Economic Hierarchy, Religion, and PoliticsHongshan monuments share a number of characteristics withthose of the Alto Magdalena. Both were, in their very essence,monuments dedicated to specific individuals, who were buried inthe central tombs, frequently surrounded by less central burialsof other important individuals. The sculptural elaboration of theAlto Magdalena monumental burials, like the Hongshan jades,emphasizes the supernatural. Offerings suggesting personalwealth are scarce in Alto Magdalena tombs (21), as in Hongshanplatform burials. Highly visible monuments in both regions,then, signal hierarchies with a strongly similar symbolic basis. Ineach case, the presumably ritual activities for which thesemonuments were constructed were critical to the integration ofsupralocal chiefly communities. Both Hongshan and Alto Mag-dalena burial monuments were the central elements of publicspaces suitable for the assembly of large numbers of people.Architectural layouts were open, and access to theses spaces wascompletely unrestricted. [The lone Hongshan enclosed ritualspace (22) seems the exception that proves the rule.] The entirepopulation of a Hongshan or Alto Magdalena chiefdom couldeasily have assembled in the level or sloping space around themonumental tombs of important people. In addition, whereverinformation about habitational remains is available, these publicspaces were fully integrated into the central residential zones oftheir respective chiefdoms. These ritual activities are the mostreadily identifiable special functions of central places.

As we have already seen, in the Alto Magdalena this ritualhierarchy is not complemented by a distinct one of more secularcharacter, as it is in the Hongshan case. Precisely such a secularhierarchy in Oaxaca, though, provides a very strong parallel toHongshan organization. The modest amounts of utilitarian andornamental objects that distinguish the burials of higher rankingpeople in Oaxaca recall not the Alto Magdalena burial moundsor the Hongshan platform tombs, but rather the non-platformburials of Hongshan villagers. It is in these burials, along withhousehold evidence, that social hierarchy in Oaxaca finds itsexpression. Each of the two distinct hierarchies present inHongshan society has a parallel in the other regions we discuss—the ritual burial hierarchy in the Alto Magdalena, and the moresecular hierarchy in Oaxaca—but only Hongshan society con-tains both as distinct social phenomena.

While the secular character of Oaxaca’s social hierarchy ismost prominent (in residential architecture, household activities,and burial practices), it is by no means disconnected fromreligious belief. Evidence of religious activity in Oaxaca comesin various forms. Small ceramic figurines are widely dispersedthrough household remains, suggesting an important role forhousehold-level rituals. Communal ritual probably also playedan important role in the formation and integration of socialgroups from the time of the earliest settled villages. In contrastto the principal Hongshan ritual spaces, or those of the AltoMagdalena, Oaxaca village ritual spaces were small and ofrestricted access (23). Initially there were single-room structuresno more than 4 � 6 m whose architectural form made themconspicuously different from ordinary houses but which couldnot have accommodated more than a very small proportion ofany village’s population. Later public buildings, sometimesraised on platforms 1 or 2 m high, were also small and enclosed.Such buildings sometimes occurred in groups, on the four sidesof unroofed rectangular patios. Although these patios werelarger than the spaces inside the buildings themselves, they werestill much smaller than the plaza areas adjacent to Hongshan or

Alto Magdalena burial monuments, and could by no meansincorporate entire district (or even local) populations. Admit-tance to space was highly controlled, since even the unroofedpatios could be entered only through restricted openings at theircorners. In all three regions, then, public or ritual spaces werecreated to bring groups of people together, but only in Oaxacado these spaces seem explicitly designed to set apart theseassembled groups from the rest of the population by excludingnonparticipants.

These simultaneously integrative and exclusionary ritualstructures were spatially associated with elite residential areas atSan Jose Mogote, and the participation of high-ranking peoplein this sort of ritual activity surely contributed to the process ofsocial differentiation in Oaxaca. This association culminates inthe late Rosario phase conversion of a temple structure at SanJose Mogote into an unprecedented stone and adobe multiroomelite residence on a platform 22 � 28 m (Fig. 9). NeitherHongshan nor Alto Magdalena elites ever enjoyed a standard ofliving so far above that of their lower-ranking contemporaries.The strongly economic character of social differentiation inOaxaca is as clear as its reinforcement in ritual is unmistakable.Hierarchy in Oaxaca has its center of gravity, and perhaps itsorigins, in the economics of local communities, but it is clearlyalso strengthened through ritual, especially in its supralocalprojection. The relief carving of a naked bleeding body (Fig. 5),walked on by those entering the patio adjacent to the residenceof the San Jose Mogote district’s presumed ruler at the end ofthe Rosario phase, appears to be a high-ranking person fromanother community captured and killed by San Jose Mogote (9,24, 25). Burned structures at San Jose Mogote provide additionalindications of intervillage warfare and raiding. Supralocal chief-dom organization in Oaxaca, then, may have been a politico-ceremonial structure of relationships between elites at San JoseMogote and preexisting communities—relationships that oftenturned violent as San Jose Mogote sought to dominate them.This regional-scale elite structure was built on a foundation ofeconomic interdependence and differentiation within local com-munities. Thus, the unitary and fundamentally economic hier-archy of Oaxaca chiefdoms was laced tightly together withreligious belief and ritual, especially insofar as supralocal politicswere concerned.

Supralocal Organization and ConflictThe twin hierarchies of Hongshan society (symbolic and eco-nomic) represent a rather different dynamic in the relationshipbetween ritual, economy, and politics, and Hongshan districts

Fig. 9. Stone masonry platform at San Jose Mogote built to support atemple; after the temple was burned, its place was taken by an elaboratemultiroom residence.

3964 � www.pnas.org�cgi�doi�10.1073�pnas.0510862103 Drennan and Peterson

Dow

nloa

ded

by g

uest

on

Aug

ust 1

9, 2

020

did not form in the same way the San Jose Mogote district did.The comparatively rapid development of craft specialization andsocial differentiation in Oaxaca during 300 or 400 years produceda growing number of largely redundant independent villagecommunities, usually a few kilometers apart, each with strongeconomically based internal integration and social hierarchy.Valley-wide politics consisted of relationships, eventually com-petitive, between the elites of these clearly defined village units.San Jose Mogote’s early demographic edge finally proved insu-perable, as its elite progressively dominated nearby villages untilits domain included well over half the valley’s population. Otherchiefdoms were so much smaller that, although raiding fromthem could have been a thorn in San Jose Mogote’s side, by theRosario phase there was no real possibility of their dominatingSan Jose Mogote militarily. This entire process of amalgamationof most of the other local communities in the valley into the SanJose Mogote chiefdom occurred during some 700 years ofdemographic stability; it cannot have been driven by regionalpopulation growth.

The Hongshan districts of the Chifeng region grew by a verydifferent process. Craft specialization and social differentiationemerged only very slowly, after 1,500 years or more of sedentaryliving before the Hongshan period. Even then, village-leveleconomic differentiation and integration were less strong than inOaxaca. As chiefly districts formed in Chifeng, there was noamalgamation of preexisting villages. Instead, as villages grew,their relatively low level of internal interaction facilitated fis-sioning, producing multiple local communities within a very fewkilometers of each other. It was these sets of mother anddaughter communities that comprised Chifeng’s spatially com-pact chiefly districts. Growing population, then, was at the heartof the formation of Hongshan chiefdoms. It is difficult to tellwhether most of the demographic change occurred rapidly inshort episodes, because the periods that provide chronologicalcontrol in Chifeng are so long, but it is clear that it took thecumulative demographic growth of some 3,000 years after theestablishment of sedentary living to arrive at the full develop-ment of Hongshan chiefly districts. No one of these districtsbecame very much larger than any other, nor is there anyindication that any Hongshan district ever subjugated anotherone. (And this degree of political fragmentation continued tocharacterize the Chifeng region for another 2,500 years after theend of the Hongshan period as well.)

The resolutely small scale and conservatism of supralocalpolitics in Chifeng might be attributed to the separation betweensymbolic and economic hierarchies. Some of the pathways toconsolidation of power and its supralocal projection wereblocked to either of the Hongshan elites because of the existenceof the other, potentially rival, hierarchy. The Hongshan arche-ological record has thus far not produced iconography of warfareor violence, or evidence of widespread burning, of weapons, orof clear-cut fortifications. The ditches often found at ChineseNeolithic village sites have sometimes been seen as fortifications,but they occur frequently in the absence of evidence for socialhierarchy, so the two known instances for Hongshan period sitesare difficult to connect to supralocal elite hostilities. Amongthese less cohesively led communities with less-developed eco-nomic integration, there was less potential for the emergence ofthe kind of conflict between the elites of different communitiesthat provided the milieu in which supralocal political integrationwas effected in Oaxaca. By the end of the Rosario phase, SanJose Mogote’s economic elites had consolidated a degree ofsecular political power supported by religious ritual that enabledthem to dominate a much larger territory than that of anyHongshan district in Chifeng. (And they were just on thethreshold of 500 years of remarkable demographic, social,political, and economic change that culminated in the city of

Monte Alban with tens of thousands of inhabitants—the capitalof a conquest empire of well over 10,000 km2.)

In contrast to the Hongshan social ranking system, there wasno alternate hierarchy as a potential rival to the supernaturalauthority of Alto Magdalena elites. As in Oaxaca, there isevidence that Alto Magdalena elites used violence in the pro-jection of their position. Sculpted figures accompanying eliteburials sometimes carry weapons or even apparent trophy heads.Evidence of violent conflict, however, is not abundant in theremains of daily life from the Alto Magdalena. Flaked stonepoints, for example, like those on spears depicted in statues arewell preserved in the archeological record, but they are extraor-dinarily rare in Alto Magdalena lithic assemblages (less than 1per 100,000 sherds). Alto Magdalena occupation does not favordefensible locations; its dispersal does not lend itself to easydefense; and no fortifications are known. Violent conflict in bothOaxaca and the Alto Magdalena, then, seems political, eventhough the elites engaged in it owed their positions largely to theeconomics of daily life in Oaxaca and to the supernatural in theAlto Magdalena. Although conflict in chiefdom developmenthas often been attributed to population pressure and scarcity ofresources, the two regions with the most evidence of violencehave the highest and the lowest population densities (20–40persons per km2 for the Regional Classic in the Alto Magdalena,and not much more than 1 person per km2 for the Rosario phasein the Valley of Oaxaca). Chifeng, with little evidence of violentconflict, had an intermediate population density (5–10 personsper km2). Not even the high population density in the AltoMagdalena created serious pressure on resources, and resourcescarcity cannot have driven the forcible domination of neigh-boring communities in Oaxaca, given its extremely low popula-tion density (Fig. 10).

Conflict in the Alto Magdalena was not part of a Oaxaca-likeprocess of coercive amalgamation of preexisting neighboringcommunities into chiefly districts. The central buds from whichdistricts grew are visible earlier as modest concentrations ofoccupation, which progressively increase in population, density,and degree of concentration through 1,000 years or more.Multiple regional-scale communities of similar size [‘‘peer pol-ities’’ a la Renfrew and Cherry (26)] are often thought to providea competitive environment that spurs vigorous development oflarger-scale and more complex organization. The vigorous urbanand imperial growth that follows close on the heels of the SanJose Mogote chiefdom, however, contrasts with this line ofthinking, since it is a rapid expansion of the single very largepolity that was already much larger than any neighbor in theValley of Oaxaca. Hongshan Chifeng and Regional Classic AltoMagdalena also contrast with the usual peer-polity argument,but in the opposite way: they represent peer polities, but at astalemate. None of these polities ever grew to larger spatial scale,and all remained at approximately the same demographic levelas the others in the region. Larger-scale political unification in

Fig. 10. Changes in population density in all three regions.

Drennan and Peterson PNAS � March 14, 2006 � vol. 103 � no. 11 � 3965

AN

THRO

POLO

GY

INA

UG

URA

LA

RTIC

LE

Dow

nloa

ded

by g

uest

on

Aug

ust 1

9, 2

020

both regions came only much later, when they were incorporatedinto large imperial domains originating from outside.

Long-Distance NetworksChiefly elites are often seen as seeking social advancementthrough manipulation of connections to other elites hundreds ofkilometers away, especially where leadership is strongly identi-fied with particular individuals and ostentatious displays ofwealth, symbols of prestige, or esoteric knowledge. Such long-distance connections, and the importation of prestige goods, arethought to be less important where leadership is less personal,wealth differences are less pronounced, and ritual is morecollective or communal than focused on particular individuals.This latter package of traits has been labeled a ‘‘corporate’’ modeof organization to contrast with the former ‘‘network’’ mode(27). All three of the regions compared show stylistic similaritiesin ceramics and other artifacts that demonstrate that theirinhabitants were in contact with distant populations. It is clearlyin the Valley of Oaxaca, however, where evidence for long-distance interaction is most abundant. At San Jose Mogote, some365 of every 100,000 sherds have been classified as ‘‘foreign’’ceramic types (from distant regions) (6). In the Alto Magdalena,such foreign ceramic types have not been identified, and onlyabout 1 sherd of 100,000 is not readily classifiable in the localtypology. Similarly, at Fushanzhuang, sherds not easily classifiedas Hongshan are virtually nonexistent. At least some of the greenstone used for Oaxaca ornamental objects was of extra-regionalorigin. The same could be true for Hongshan jade, but at leastone local jade workshop is known (28). Marine shell from distantcoasts occurs in Hongshan and Alto Magdalena sites, but thequantity falls far below that of imported goods at San JoseMogote, where preserved remains of animals native to otherregions (usually in the form of ornamental or ritual objects)account for some 500 items per 100,000 sherds (6). Craftspecialists at San Jose Mogote made small magnetite mirrorsthat were traded hundreds of kilometers away. Obsidian is arelatively common raw material for flaked stone tools in bothOaxaca and the Alto Magdalena. The sources for the AltoMagdalena obsidian are not identified, but they might have beenquite near or even within the region; and the material itself is ofsuch poor quality that it is an unlikely candidate for long-distancemovement. In contrast, Oaxaca obsidian is of high quality, occursas the product of a sophisticated prismatic blade industry, and isknown to have come from as far away as 400 km.

Oaxaca, then, stands out for having the most diverse, intensive,and highly developed interactions with distant regions. Contraryto expectation, leaders in Oaxaca are less conspicuous as par-ticular individuals than in either Chifeng or the Alto Magdalena,where their burial monuments are simultaneously the foci ofcollective ritual spaces. Symbols of prestige and esoteric knowl-edge are strongly presented in Chifeng and the Alto Magdalena,even though these are the regions with less developed long-distance connections. Wealth is most readily identifiable inOaxaca, where interregional interactions were strong, and inChifeng, where they were weak. The social characteristics, then,laid out as the basis for the distinction between corporate andnetwork strategies, do not, even in just these three cases, formmeaningful packages.

ConclusionsRecognition that supralocal communities based on institution-alized social hierarchy have emerged repeatedly in humanhistory was among the central contributions of early culturalevolutionary thinking. Comparing just three trajectories of chief-dom development, however, reveals considerable variability inthe forms that early hierarchical societies can take and in theways in which they emerge. The fact that there is not just one kindof chiefdom or one pattern of development in no way under-

mines the cultural evolutionary observation, and delineatingdifferent kinds of chiefdoms (usually by dichotomies) has beencommon in the more recent cultural evolutionary literature. Anumber of these dichotomies have usefully called attention toways in which chiefdoms differ, although none by itself encap-sulates the essence of this variability, which is simply too rich andcomplex to be characterized in this way. In the first place,dichotomies oversimplify what is more likely to be an axis ofcontinuous variability by making its extremes into typologicalpigeonholes. It is easy to assert that a social characteristic shouldbe treated as continuously variable, but it is difficult to put thisinto practice when dealing with only one or two cases at a time,as is usual in chiefdom studies. Even with just three cases, itbecomes considerably easier to think in terms of continuousscales of variability, since no two are likely to be identical in anyregard. Here, for example, we have found tightly nucleatedvillage communities in the Valley of Oaxaca, but not in the AltoMagdalena where occupation was widely scattered. This dichot-omy automatically converts itself into an axis of continuousvariation when Hongshan is added to the comparison. TheHongshan settlement pattern falls between these extremes, butnot just in the middle; rather, its position, while clearly differentfrom that of the Valley of Oaxaca, is much closer to that end ofthe axis than to the Alto Magdalena. A much larger number ofcases than three is needed to really populate the axis and showthe full range and nature of the variation. Comparative analysis,then, of numerous cases is needed for adequate characterizationof the variability among chiefdoms, and the very richness of sucha comparison makes it easier to avoid false dichotomies bydealing in at least relative measurement along a continuousscale.

As we have seen, there is not just a single critical axis ofvariability among chiefdoms but several that seem to matter. Inthis brief effort, we have noted variation in the demographic andspatial scale of chiefly districts and in the extent to which localcommunities structured interaction, economic production wasspecialized, hierarchy was connected to the supernatural, ine-qualities implied different standards of living, districts formed inconflict and conquest, population growth fostered the formationof supralocal communities, prestige goods were imported fromother regions, leadership was strongly focused on particularindividuals, ritual was communal as opposed to exclusionary,and social hierarchy was unitary, among other things. One wayin which a focus on such variation can help reveal generalprinciples is through the empirical investigation of relationshipsbetween such measurements. For these three regions, for exam-ple, economic specialization and interdependence seem the mainforces that produced nucleated villages, and ceremonialism wasmore important to supralocal organization. Such supralocalorganization was only achieved by unitary hierarchies, and onlythe unitary hierarchy of the San Jose Mogote chiefdom, bindinglocal economics to supralocal ceremonialism, eventually becamethe backbone of state-level organization. Supralocal organiza-tion that formed and expanded through a process of internalgrowth slowly filled a landscape with persistently independentchiefdoms of similar size (Hongshan and Alto Magdalena),whereas supralocal organization created by a larger communityforcibly annexing smaller neighbors proceeded rapidly to a muchlarger scale (Oaxaca). These patterns of relationships compriseprinciples that might operate generally in chiefdom emergence.They seem plausible and hold true for three trajectories, but thisfalls far short of a convincing case for their generality, so theyremain hypothetical. To the extent that such principles areobserved repeatedly (although not necessarily universally) in amuch larger number of cases, our confidence in their generalitywill grow. These principles not only offer general understandingsbut are simultaneously the basis of recipes for how particular setsof ingredients combine to produce the distinct ‘‘f lavors’’ of

3966 � www.pnas.org�cgi�doi�10.1073�pnas.0510862103 Drennan and Peterson

Dow

nloa

ded

by g

uest

on

Aug

ust 1

9, 2

020

different chiefdom trajectories. Additional comparative studywill be needed even to arrive at a full appreciation of the varietyof flavors to be observed. The comparative study of the variationbetween trajectories thus expands and complements the tradi-tional cultural evolutionary quest for universals seen in similar-ities between cases. Extracting fundamental principles frompatterned variation presents a greater challenge than traditionalcomparisons in several ways. While it can begin by generatinghypotheses from only a few cases, it finally must include a greatmany cases so that general patterns can be discerned. It mustcope with many societal variables, resisting the temptation todichotomize or oversimplify. It will require an expanded reper-toire of analytical tools capable of measuring these societalvariables in at least relative terms (a few of which we haveattempted to apply here). Perhaps most important, and certainly

slowest, it will require the concerted efforts of large numbers ofregional specialists to collect numerous sufficiently comparabledata sets on which such tools can be used, and to present thosedata sets in such a way as to make them available for comparativeanalysis.

We thank all our fellow participants in the Chifeng InternationalCollaborative Archaeological Research Project, the Programa de Ar-queologıa Regional en el Alto Magdalena, and the Proyecto Arqueo-logico Valle de la Plata, which produced much of the information (someas yet unpublished) we have relied on for Northeast China and the AltoMagdalena. Because results from very recent fieldwork at Fushanzhuanghave not appeared elsewhere in print at all, special thanks are due toparticipants Gwen Bennett and Guo Zhizhong. We are grateful toStephen Kowalewski for Valley of Oaxaca settlement data in electronicform and to Joyce Marcus and Kent Flannery for helpful comments onthe manuscript.

1. Drennan, R. D. & Peterson, C. E. (2005) in Settlement, Subsistence, and SocialComplexity: Essays Honoring the Legacy of Jeffrey R. Parsons, ed. Blanton, R.E.(Cotsen Institute of Archaeology, University of California, Los Angeles), pp.119–154.

2. Peterson, C. E. & Drennan, R. D. (2005) Am. Antiq. 70, 5–30.3. Blanton, R. E., Kowalewski, S., Feinman, G. & Appel, J. (1982) Monte Alban’s

Hinterland, Memoirs of the Museum of Anthropology (Univ. of Michigan, AnnArbor), No. 15, Part 1.

4. Kowalewski, S. A., Feinman, G. M., Finsten, L., Blanton, R. E. & Nicholas,L. M. (1989) Monte Alban’s Hinterland, Memoirs of the Museum of Anthro-pology (Univ. of Michigan, Ann Arbor), No. 23, Part 2.

5. Flannery, K. V., ed. (1976) The Early Mesoamerican Village (Academic, New York).6. Flannery, K. V. & Marcus, J. (2005) Excavations at San Jose Mogote 1: The

Household Archaeology, Memoirs of the Museum of Anthropology (Univ. ofMichigan, Ann Arbor), No. 40.

7. Drennan, R. D. (1976) Fabrica San Jose and Middle Formative Society in theValley of Oaxaca, Memoirs of the Museum of Anthropology (Univ. of Mich-igan, Ann Arbor), No. 8.

8. Whalen, M. E. (1981) Excavations at Santo Domingo Tomaltepec: Evolution ofa Formative Community in the Valley of Oaxaca, Mexico, Memoirs of theMuseum of Anthropology (Univ. of Michigan, Ann Arbor), No. 12.

9. Marcus, J. & Flannery, K. V. (1996) Zapotec Civilization: How Urban SocietyEvolved in Mexico’s Oaxaca Valley (Thames & Hudson, London).

10. Drennan, R. D. (2000) Las Sociedades Prehispanicas del Alto Magdalena(Instituto Colombiano de Antropologıa e Historia, Bogota, Colombia).

11. Drennan, R. D. (2006) Prehispanic Chiefdoms in the Valle de la Plata, Universityof Pittsburgh Memoirs in Latin American Archaeology (Univ. of Pittsburgh,Pittsburgh), Vol. 5, No. 16.

12. Renfrew, C. (1974) Suppl. Bull. Am. Sch. Oreient. Res. 20, 69–85.13. Llanos Vargas, H. (1995) Los Chamanes Jaguares de San Agustın: Genesis de un

Pensamiento Mitopoetico (H. Llanos Vargas, Bogota, Colombia).

14. Linduff, K. M., Drennan, R. D. & Shelach, G. (2004) J. Field Archaeol. 29,45–73.

15. Chifeng International Collaborative Archeological Research Project (2003)Regional Archeology in Eastern Inner Mongolia: A Methodological Exploration(Science Press, Beijing).

16. Liaoning Sheng Wenwu Kaogu Yanjiusuo (1997) Niuheliang Hongshan WenhuaYizhi yu Yuqi Jingcui (Wenwu Chubanshe, Beijing).

17. Chaoyang Shi Wenwubu & Liaoning Sheng Wenwu Kaogu Yanjiusuo (2004)Niuheliang Yizhi (Xuexiao Chubanshe, Beijing).

18. Childs-Johnson, E. (1991) Arts Asiatiq. 46, 82–95.19. Neimenggu Wenwu Kaogu Yanjiusuo (1997) in Neimenggu Wenwu Kaogu

Wenji, ed. Wei, J. (Zhongguo Daibaike Jinshu Chubanshe, Beijing), Vol. 2, pp.53–77.

20. Earle, T. K. (1997) How Chiefs Come to Power: The Political Economy inPrehistory (Stanford Univ. Press, Stanford, CA).

21. Drennan, R. D. (1995) in Tombs for the Living: Andean Mortuary Practices, ed.Dillehay, T. D. (Dumbarton Oaks, Washington, DC), pp. 79–110.

22. Liaoning Sheng Wenwu Kaogu Yanjiusuo (1986) Wenwu 1986(8), 1–17.23. Flannery, K. V. & Marcus, J. (1976) in Cultural Change and Continuity: Essays

in Honor of James Bennett Griffin, ed. Cleland, C. E. (Academic, New York),pp. 205–221.

24. Flannery, K. V. & Marcus, J. (1983) in The Cloud People: Divergent Evolutionof the Zapotec and Mixtec Civilizations, eds. Flannery, K. V. & Marcus, J.(Academic, New York), pp. 53–65.

25. Flannery, K. V. & Marcus, J. (2003) Proc. Natl. Acad. Sci. USA 100, 11801–11805.

26. Renfrew, C. & Cherry, J. F., eds. (1986) Peer Polity Interaction and Socio-Political Change (Cambridge Univ. Press, Cambridge, U.K.).

27. Blanton, R. E., Feinman, G. M., Kowalewski, S. A. & Peregrine, P. N. (1996)Curr. Anthropol. 37, 1–14.

28. Liu, J. & Dong, X. (1997) Wenwu 1997(8), 48–56.

Drennan and Peterson PNAS � March 14, 2006 � vol. 103 � no. 11 � 3967

AN

THRO

POLO

GY

INA

UG

URA

LA

RTIC

LE

Dow

nloa

ded

by g

uest

on

Aug

ust 1

9, 2

020