In many theories on the social and cultural evolution of human societies, the number and density of people living together in a given time and region is a crucial factor. Because direct data on past demographic developments are lacking, and reliability and validity of demographic proxies require careful evaluation, the topic has been approached from several different directions. This paper provides an introduction to a geostatistical approach for estimating prehistoric population size and density, the so-called Cologne Protocol and discusses underlying theoretical assumptions and upscaling transfer-functions between different spatial scale levels. We describe and compare the specifics for farming and for foraging societies and, using examples, discuss a diachronic series of estimates, covering the population dynamics of roughly 40 kyr of European prehistory. Ethnohistoric accounts, results from other approaches—including absolute (ethno-environmental models) and relative estimates (site-numbers, dates as data, etc.) allow a first positioning of the estimates within this field of research. Future enhancements, applications and testing of the Cologne Protocol are outlined and positioned within the general theoretical and methodological avenues of palaeodemographic research. In addition, we provide manuals for modelling Core Areas in M ap I nfo , A rc GIS, QGIS/S aga and R. This article is part of the theme issue ‘Cross-disciplinary approaches to prehistoric demography’.

Populations headed south? The Gravettian from a palaeodemographic point of view - Volume 91 Issue 357 - Andreas Maier, Andreas Zimmermann

Cultural systems play an important role in shaping the interactions between humans and the environment, and are in turn shaped by these interactions. However, at present, cultural systems are poorly integrated into the models used by climate scientists to study the interaction of natural and anthropogenic processes (i.e. Earth systems models) due to pragmatic and conceptual barriers. In this Perspective, we demonstrate how the archaeology of climate change, an interdisciplinary field that uses the archaeological record to explore human-environment interactions, is uniquely placed to overcome these barriers. We use concepts drawn from climate science and evolutionary anthropology to show how complex systems modeling that focuses on the spatial structure of the environment and its impact on demographic variables, social networks and cultural evolution, can bridge the gap between large-scale climate processes and local-scale social processes. The result is a blueprint for the design of integrative models that produce testable hypotheses about the impact of climate change on human systems.