Neolithic pottery reveals contrasting patterns of social complexity

Neolithic pottery from southwestern Germany and central Ukraine showed contrasting relationships between decorative diversity and social complexity, according to an October 8 announcement by Germany’s Leibniz-Zentrum für Archäologie (LEIZA). Researchers report that increasingly complex societies could produce either more varied or more uniform ceramics, complicating how archaeologists read social change from surviving objects.

The work is by Aleksandr Diachenko of the Institute of Archaeology at Ukraine’s National Academy of Sciences and Detlef Gronenborn of LEIZA, who is also an adjunct professor at Johannes Gutenberg University Mainz. They used a mathematical model to examine population size, production capacity and information exchange.

LEIZA’s announcement identifies the research as a PLOS One study titled “Social dynamics signals in archaeological time-series: How cultural transmission and production biases shape assemblage diversity.” The findings described here are those reported by the institution about its researchers’ work.

How pottery records population and production changes

The researchers investigate recurring increases and decreases in social complexity, described as social cycles. Their model considers how the organisation and intensity of pottery production affect the number of decoration styles, alongside the effects of population growth and information exchanged between people.

According to LEIZA, the team tested its algorithm against thousands of pottery fragments from Germany and Ukraine. The announcement does not give exact sample counts. Both regional cases involved phases of rapid population growth followed by decline, but their ceramic patterns differed.

Germany and Ukraine show different pottery patterns

The German case concerns Linear Pottery Culture material from the southwest of the country, described in the announcement as approximately 7,000 years old. Increasing social complexity initially accompanied a greater diversity of pottery decorations; that diversity subsequently diminished, the researchers report.

The Ukrainian case concerns Western Trypillia Culture finds from the centre of the country, described as approximately 6,000 years old. Here, pottery styles became more uniform as social complexity increased. The researchers interpret that pattern in terms of craft specialisation.

The contrast means the reported findings do not supply a universal rule equating greater decorative variety with greater social complexity. Nor does uniformity alone establish complexity. The interpretation depends on how pottery production, population and the transmission of styles interacted in each case.

What Gamo pottery research adds to the comparison

Earlier independent field research by John W. Arthur offers relevant context for that caution. His study of pottery uniformity among the Gamo of southwestern Ethiopia compared three communities and examined full-time specialist production.

Arthur found that wares sold by Gamo potters at weekly markets were more uniform in form and decoration than pots sold to neighbours within their residential communities. Differences in uniformity therefore existed within specialist production, with the route through which pots reached their users forming part of the explanation.

His research argued that distribution arrangements, including markets and patron-client relationships, influence pottery uniformity. It also discussed vessel function, producer skill and other factors that complicate a simple connection between specialisation and standardisation.

The Ethiopian study is a methodological comparison from a different place and an earlier period of research. It is neither a replication of the European model nor an independent assessment of the new findings. Its relevance lies in showing why production and distribution need attention when interpreting ceramic similarities.

What remains uncertain about the European model

Diachenko explicitly cautioned against treating the interpretation as settled. “However, before drawing robust conclusions, we need to thoroughly understand the underlying mechanisms,” he said in the institutional announcement. Linking pottery and population time series, he explained, is proving insightful, but the work remains a step towards understanding past social behaviour.

The announcement does not provide the model equations, exact sample sizes or statistical uncertainty needed for a detailed assessment of its performance. It also does not establish that either regional pattern can be applied generally to other societies.

Gronenborn suggested that the work could eventually inform understanding of contemporary societies. The announcement reports no demonstrated present-day application or forecast accuracy, however. Further understanding of the mechanisms is an expressed research need; no scheduled follow-up project or next milestone is identified.