| Preface | 5 |
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| Acknowlegements | 11 |
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| Contents | 12 |
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| Contributors | 15 |
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| Part I Introduction | 18 |
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| 1 Primate Behavior and Human Universals: Exploring the Gap | 19 |
| 1.1 Introduction | 19 |
| 1.2 The Gap is Behavioral | 20 |
| 1.3 A Brief History of the Gap | 21 |
| 1.4 Explaining the Gap | 23 |
| 1.5 Primatology and the Gap | 25 |
| 1.6 Uniquely Human | 27 |
| References | 28 |
| Part II Family | 28 |
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| 32 | 28 |
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| 2 The Deep Structure of Human Society: Primate Origins and Evolution | 33 |
| 2.1 Introduction | 34 |
| 2.2 What is Reciprocal Exogamy? | 35 |
| 2.3 Phylogenetic Evidence as a Test of the Exogamy Model | 39 |
| 2.4 Origins of the Multifamily Community | 41 |
| 2.5 Kinship in Early Hominid Society | 43 |
| 2.6 The Evolution of Stable Breeding Bonds | 47 |
| 2.7 Fatherhood and the Expansion of Kinship | 50 |
| 2.8 The Origins of Exogamy and Postmarital Residence | 52 |
| 2.9 The “Atom of Between-Group Alliances” | 53 |
| 2.10 The Nascent Tribe | 56 |
| 2.11 The Evolution of Residential Diversity | 57 |
| 2.12 The Origins of Exogamy Rules | 58 |
| 2.13 Conclusion | 60 |
| References | 61 |
| 3 Conflict and Bonding Between the Sexes | 66 |
| 3.1 An Approach to Universals | 67 |
| 3.2 What is Sexual Conflict? | 68 |
| 3.3 Approaches to Studying Sexual Conflict | 69 |
| 3.4 Pre- and PostCopulatory Conflict over Mating: Sexual Coercion | 70 |
| 3.5 PostCopulatory Sexual Conflict: Prezygotic | 79 |
| 3.6 Postcopulatory Sexual Conflict: Postzygotic | 81 |
| 3.7 A Counterstrategy: Male–Female Association | 82 |
| 3.8 Conclusions and Future Directions | 85 |
| References | 87 |
| 4 The Unusual Women of Mpimbwe: Why Sex Differences in Humans are not Universal | 97 |
| 4.1 Introduction | 98 |
| 4.2 Parental Investment Theory and Beyond | 99 |
| 4.3 The Unusual Women of Mpimbwe | 101 |
| 4.4 Pair Bonds in Humans | 106 |
| 4.5 Mind the Crack: Concluding Observations | 111 |
| References | 113 |
| Part III Politics | 113 |
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| 119 | 113 |
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| 5 Dominance, Power, and Politics in Nonhuman and Human Primates | 120 |
| 5.1 Introduction | 121 |
| 5.2 What is Dominance? | 122 |
| 5.3 Functions of Dominance | 123 |
| 5.4 Sources of Variation in Female Dominance Style: Ecology, Phylogeny, and Self-Structuring | 124 |
| 5.5 Variation in Male Dominance Style | 129 |
| 5.6 Power and Politics | 130 |
| 5.7 Politics and Cognition | 137 |
| 5.8 Politics in Human versus Non-Human Primates | 141 |
| References | 144 |
| 6 Human Power and Prestige Systems | 150 |
| 6.1 Introduction | 150 |
| 6.2 The Basis of Social Power in Primates | 151 |
| 6.3 Prestige: A Unique Source of Social Power | 152 |
| 6.4 The Evolutionary Origins of Prestige | 153 |
| 6.5 Prestige, Signaling and the Origins of Inequality | 156 |
| 6.6 Conclusions | 161 |
| References | 161 |
| 7 The End of the Republic | 164 |
| 7.1 Introduction | 164 |
| 7.2 Senators, Soldiers, Slaves and a Sterile Caste | 166 |
| 7.3 Emperors | 171 |
| 7.4 Reproductive Skew | 175 |
| References | 177 |
| Part IV Intergroup Relationships | 180 |
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| 8 Intergroup Aggression in Primates and Humans: The Case for a Unified Theory | 181 |
| 8.1 Introduction | 181 |
| 8.2 Nonhuman Primates Living in Troops | 183 |
| 8.3 Chimpanzees | 194 |
| 8.4 Humans | 198 |
| 8.5 Discussion | 200 |
| References | 201 |
| 9 Why War? Motivations for Fighting in the Human State of Nature | 206 |
| 9.1 Introduction | 206 |
| 9.2 Subsistence Resources | 207 |
| 9.3 Reproduction | 210 |
| 9.4 Dominance: Rank, Power, Status, Prestige | 215 |
| 9.5 Revenge: Retaliation to Eliminate and Deter | 216 |
| 9.6 Power and the Security Dilemma | 218 |
| 9.7 World-View and the Supernatural | 219 |
| 9.8 Playfulness, Adventurism, Ecstasy | 221 |
| 9.9 Cooperation in Fighting | 222 |
| 9.10 Conclusion: Fighting in the Evolutionary State of Nature | 224 |
| References | 226 |
| Part V Foundations of Cooperation | 230 |
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| 10 From Grooming to Giving Blood: The Origins of Human Altruism | 231 |
| 10.1 Introduction | 231 |
| 10.2 The Evolution of Altruism | 232 |
| 10.3 Kin Biases in Behavior | 234 |
| 10.4 Cooperation Among Reciprocating Partners | 235 |
| 10.5 Limits of Altruism in Primate Groups | 237 |
| 10.6 Motives Underlying Altruism in NHPs | 238 |
| 10.7 The Origins of Other Regarding Preferences in Humans | 242 |
| 10.8 Conclusions | 248 |
| References | 248 |
| 11 Evolved Irrationality? Equity and the Origins of Human Economic Behavior | 253 |
| 11.1 Homo economicus: Model Subject or Tall Tale? | 253 |
| 11.2 The Irrationality of Human Preferences | 256 |
| 11.3 Irrational Equity-Seeking and the Emergence of Human Fairness Norms | 258 |
| 11.4 The Evolution of Primate Economic Strategies: Monkey Markets | 260 |
| 11.5 Primate Economic Irrationalities: Do Monkeys Exhibit Human Economic Biases? | 262 |
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