| Introduction by Lewis Thomas, M.D. | ix |
| 1 Investigation: The Rage to Know | 1 |
| 2 Pattern | 25 |
| 3 Change | 53 |
| 4 Chance | 67 |
| 5 Feedback | 87 |
| 6 Modeling | 111 |
| 7 Strong Predictions | 131 |
| 8 Evidence | 161 |
| 9 Theory | 183 |
| Epilogue: Eight Problems in Search of Solutions | 200 |
| Bibliography | 205 |
| Acknowledgments | 206 |
| Picture Credits | 206 |
| Index | 207 |