CONTENTS PREFACE i PART I Introduction 1.The Problem ofCooperation 3 PART II The Emergence of Cooperation 2.The Success of TIT FOR TAT in Computer Tournaments 27 3.The Chronology ofCooperation 55 PART III Cooperation Without Friendship or Foresight 4.The Live-and-Let-Live System in Trench Warfare in World War I 73CONTENTS PREFACE vi PART I Introduction 1. The Problem of Cooperation 3 PART II The Emergence of Cooperation 2. The Success of TIT FOR TAT in Computer Tournaments 27 3. The Chronology of Cooperation 55 PART III Cooperation Without Friendship or Foresight 4. The Live-and-Let-Live System in Trench Warfare in World War I 73 v