This volume features a collection of essays by primatologists, anthropologists, biologists, and psychologists who offer some answers to the question of what makes us human, i. e. , what is the nature and width of the gap that separates us from other primates? The chapters of this volume summarize the latest research on core aspects of behavioral and cognitive traits that make humans such unusual animals. All contributors adopt an explicitly comparative approach, which is based on the premise that comparative studies of our closest biological relatives, the nonhuman primates, provide the logical foundation for identifying human univ- sals as well as evidence for evolutionary continuity in our social behavior. Each of the chapters in this volume provides comparative analyses of relevant data from primates and humans, or pairs of chapters examine the same topic from a human or primatological perspective, respectively. Together, they cover six broad topics that are relevant to identifying potential human behavioral universals. Family and social organization. Predation pressure is thought to be the main force favoring group-living in primates, but there is great diversity in the size and structure of social groups across the primate order. Research on the behavioral ecology of primates and other animals has revealed that the distribution of males and females in space and time can be explained by sex-speci?c adaptations that are sensitive to factors that limit their ?tness: access to resources for females and access to potential mates for males.

Primate Behavior and Human Universals: Exploring the Gap

Family & Social Organization
The Deep Structure of Human Society: Primate Origins and Evolution
Conflict and Bonding Between the Sexes
The Unusual Women of Mpimbwe: Why Sex Differences in Humans are not Universal
Politics & Power
Dominance, Power, and Politics in Nonhuman and Human Primates
Human Power and Prestige Systems
The End of the Republic
Intergroup Relationships
Intergroup Aggression in Primates and Humans: The Case for a Unified Theory
Why War? Motivations for Fighting in the Human State of Nature
Foundations of Cooperation
From Grooming to Giving Blood: The Origins of Human Altruism
Evolved Irrationality? Equity and the Origins of Human Economic Behavior
From Whence the Captains of Our Lives: Ultimate and Phylogenetic Perspectives on Emotions in Humans and Other Primates
Language, Thought & Communication
Primate Communication and Human Language: Continuities and Discontinuities
Language, Lies and Lipstick: A Speculative Reconstruction of the African Middle Stone Age "Human Revolution"
Brain and Behaviour in Primate Evolution
The Gap is Social: Human Shared Intentionality and Culture
The Evolution and Development of Human Social Cognition
Deceit and Self-Deception
Human Universals and Primate Symplesiomorphies: Establishing the Lemur Baseline
Innovation & Culture
Ape Behavior and the Origins of Human Culture
The Coevolution of Genes, Innovation, and Culture in Human Evolution
Conclusions
Mind the Gap: Cooperative Breeding and the Evolution of Our Unique Features.