"Fascinating and important information from the world of science." -- New York Times Book Review

"Proposes a new way of looking at an ongoing debate." -- Washington Post Book World

"Matt Ridley breathes new life into the old debate of heredity versus environment. He deftly examines subjects as diverse as sexual identity, political theory, and psychotic behavior. This book will both edify and excite the intelligent reader." -- Jerome Groopman, M.D.

"An engrossing study of what makes us who we are ... conveyed with insight and style." -- Publishers Weekly (starred review)

"I would never have expected a book about 'nature or nurture' to be even mildly interesting, let alone a real page-turner. But I had reckoned without Matt Ridley's gift for surprising the reader. What a superb writer he is, and he seems to get better and better." -- Richard Dawkins, author of The Selfish Gene

"Ridley is simply one of the best science writers in the business." -- Hartford Courant

"Bracingly intelligent, lucid, balanced--witty, too....A scrupulous and charming look at our modern understanding of genes and experience." -- Oliver Sacks

"Terrific popular science." -- Booklist (starred review)

"A delight. . . a rich overview and a compellingly integrated picture of a great deal of science, both old and new." -- Nature

"Thoughtful and entertaining." -- Salon.com

"Ridley's enthusiasm for his subject is contagious ... He writes with panache, wit and humor and displays remarkable ingenuity in finding ways to present complicated materials for the lay reader." -- Los Angeles Times