The Sex Imperative: An Evolutionary Tale of Sexual Survival

by Kenneth Maxwell

After the primordial Earth produced the miracle of life, a remarkable and strange "accident" soon came to pass. This accident was sex - a new creation that would irrevocably alter the course of life on our planet. This magnificent event would engender the multitude of life forms that have come to walk, swim, and fly upon this Earth.
Dr. Maxwell takes us on an eye-opening tour of the bizarre, fascinating, infinitely diverse world of sexual relations. From single-celled organisms to human beings, Maxwell unlocks the secrets of survival, describing in rich detail the matings, meetings, and sexual make-ups of a generous sampling of land and sea creatures. The story of sex can be startling and the female firefly uses her glowing lantern to lure male fireflies of related species by flashing the other species' mating code; the males are no good as mates but they make a delicious meal. Maxwell's story also includes an in-depth look at the uniqueness of human sexuality - he reveals why human beings, inheritors of an unusual collection of sexual traits, are considered the "sexiest" of the primates.
The sex imperative - the irresistible impulse to engage in sexual relations - has enabled animals to share their genes and evolve. Maxwell traces the progress of sex from the simple sharing of genes between cells to the elaborate courtship rituals that developed so sperm could merge with egg. In the effort to join sperm and egg, species have developed some astounding and unusual sexual adaptations. As Maxwell vividly describes the sex lives of various creatures, he attests to the resiliency and amazing adaptability of life to its everchanging environment. By focusing on the diversity of animal sexual relationships, Maxwell enables us to question the very basis of What is sex? Why did it evolve? How does sexuality and survival shape the social behavior of animals and humans? The sex imperative is indeed the driving force behind Darwin's theory of random variation and natural selection, better known as "survival of the fittest." Maxwell goes so far as to investigate our latest accomplishment in the science of begetting genetic engineering.
This awe-inspiring and unique work celebrates the power and wonder of life and sexuality of all creatures - including humans. After reading this engrossing and illuminating work, no one will ever think of evolution in the same way.

Genres: Anthropology

332 pages, Paperback

First published April 1, 1994

About the author

Kenneth Maxwell was the founding Director of the Brazil Studies Program at Harvard University's David Rockefeller Center for Latin American Studies (DRCLAS) (2006-2008) and a Professor in Harvard's Department of History (2004-2008).

From 1989 to 2004 he was Director of the Latin America Program at the Council on Foreign Relations, and in 1995 became the first holder of the Nelson and David Rockefeller Chair in Inter-American Studies. He served as Vice President and Director of Studies of the Council in 1996. Maxwell previously taught at Yale, Princeton, Columbia, and the University of Kansas.


Kenneth Maxwell founded and was Director of the Camões Center for the Portuguese-speaking World at Columbia and was the Program Director of the Tinker Foundation, Inc. From 1993 to 2004, he was the Western Hemisphere book reviewer for Foreign Affairs. He is a regular contributor to the New York Review of Books and was a weekly columnist between 2007 and 2015 for Folha de São Paulo and monthly columnist for O Globo from 2015.

Maxwell was the Herodotus Fellow at the Institute for Advanced Study, Princeton, and a Guggenheim Fellow. He served on the Board of Directors of The Tinker Foundation, Inc., and the Consultative Council of the Luso-American Foundation. He is also a member of the Advisory Boards of the Brazil Foundation and Human Rights Watch/Americas. Maxwell received his B.A. and M.A. from St. John's College, Cambridge University, and his M.A. and Ph.D. from Princeton University.