Acknowledgments
PART ONE: The Lonely Heart
The Lonely Heart
CHAPTER ONE
Lonely in a Social World
CHAPTER TWO
Variation, Regulation, and an Elastic Leash
CHAPTER THREE
Losing Control
CHAPTER FOUR
Selfish Genes, Social Animals
CHAPTER FIVE
The Universal and the Particular
CHAPTER SIX
The Wear and Tear of Loneliness
PART TWO: From Selfish Genes to Social Beings
CHAPTER SEVEN
Sympathetic Threads
CHAPTER EIGHT
An Indissociable Organism
CHAPTER NINE
Knowing Thyself, among Others
CHAPTER TEN
Conflicted by Nature
CHAPTER ELEVEN
Conflicts in Nature
PART THREE: Finding Meaning in Connection
CHAPTER TWELVE
Three Adaptations
CHAPTER THIRTEEN
Getting It Right
CHAPTER FOURTEEN
The Power of Social Connection
Notes