Introduction
W G Runciman, pages 1-8
Social Evolution in Primates: The Role of Ecological Factors and Male Behaviour
Carel P van Schaik, pages 9-31
Determinants of Group Size in Primates: A General Model
R I M Dunbar, pages 33-57
Function and Intention in the Calls of Non-Human Primates
Dorothy L Cheney & Robert M Seyfarth, pages 59-76
Why Culture is Common, but Cultural Evolution is Rare
Robert Boyd & Peter J Richerson, pages 77-93
An Evolutionary and Chronological Framework for Human Social Behaviour
Robert A Foley, pages 95-117
Friendship and the Banker’s Paradox: Other Pathways to the Evolution of Adaptations for Altruism
John Tooby & Leda Cosmides, pages 119-143
The Early Prehistory of Human Social Behaviour: Issues of Archaeological Inference and Cognitive Evolution
Steven Mithen, pages 145-177
The Emergence of Biologically Modern Populations in Europe: A Social and Cognitive ‘Revolution’?
Paul Mellars, pages 179-201
Responses to Environmental Novelty: Changes in Men’s Marriage Strategies in a Rural Kenyan Community
Monique Borgerhoff Mulder, pages 203-222
Genetic Language Impairment: Unruly Grammars
M Gopnik, J Dalalakis, S E Fukuda, S Fukuda & E Kehayia, pages 223-249
The Emergence of Cultures among Wild Chimpanzees
Christophe Boesch, pages 251-268
Terrestriality, Bipedalism and the Origin of Language
Leslie C Aiello, pages 269-289
Conclusions
John Maynard Smith, pages 291-297