THE SEX CONTRACT: The Evolution of Human Behavior

(William Morrow, 1982)

Why can a woman have sex all month long, while other mammals like dogs and cats have a period of “heat?” Why do the vast majority of men and women fall in love and form a partnership to rear their young, while monogamy is common in only 3% of mammalian species. In this book, Fisher discusses the evolution of human female sexuality and the origins of the nuclear family—a hallmark of humankind.

“A delightfully readable and illuminating account of the origins and evolution of human behavior.”
— Ashley Montagu

“The book has many virtues…quite enthralling…a very interesting and in some ways deeply daunting anthropological survey.”
— The Times of London

Selection of the Book of the Month Club. Six foreign language editions.

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