David Haig, Professor of Biology, Harvard University
“This is an enjoyable, thought-provoking book on how our mind systematically creates distorted perceptions of reality and how these distort our presentation of self to others. I believe the book is an important contribution to psychology and social science more generally and will undoubtedly stimulate debate on these important questions.”

Publishers Weekly
“[A] spirited, provocative exploration of the evolutionary logic of deceit and self-deception.... Stimulating...Trivers's study provides an energetic exploration of a perplexing human trait.”

BBC Focus
“By Trivers's own admission, many of these ideas are speculative. But even if he does suffer from over-confidence—a type of self-deception more common in males—the admirable breadth, clarity and ambition of the result more than vindicate nature's creation of the blind spot.”
 

The Guardian (UK)
“After forty years of research Trivers wrote [The Folly of Fools] against the backdrop of a global economic meltdown caused by self-deceived, over-confident egoists grossly out of touch with reality, and when he explains how the human male drive for power and control correlates with ignorance and self-delusion, your blood runs cold.... [The Folly of Fools] is an exhilarating read: the intertwined issues of deceit and self-deception are infinite, involving positive and negative outcomes for the fool and the fooled—roles that can reverse and revert without your even knowing.”

Discover
“Weaving together examples from biology, psychology, history, and immunology, evolutionary theorist Robert Trivers argues that we deceive ourselves in order to better deceive others, and do so in order to survive, procreate, and generally get ahead.... [A] thoroughly researched, thought-provoking read.”

Nature
“[A] provocative and wide-ranging book.... Trivers touches on wide-ranging issues: the role of evolutionary biology in the social sciences; the placebo effect; lie detectors; genocide; the scientific method. But he conveys a powerful and focused message: if we can learn to recognize and fight our own self-deception, we can avoid negative consequences at levels from the individual to the national, and live better lives.”

The Economist
“In The Folly of Fools Robert Trivers...explains that the most effectively devious people are often unaware of their deceit. Self-deception makes it easier to manipulate others to get ahead. Particularly intelligent people can be especially good at deceiving themselves. Mining research in biology, neurophysiology, immunology and psychology, Mr. Trivers delivers a swift tour of the links between deception and evolutionary progress.”
 
Psychology Today
“Read this if…You're hungry for assumption-challenging explanations for your everyday behavior. Well-articulated and convincing, Trivers's theory draws on group dynamics, neuroscience, and even immunology to explain why we're all liars. Ultimately, he concludes that we're best off sensing—and telling—the truth whenever possible.”
 
Salon
“[Trivers] probably knows more about the mechanics and meaning of deception than almost anyone else in the world, and his new book, The Folly of Fools, covers pretty much anything you'd want to know about the topic.... Expansive, smart and deep, the book—a relentlessly fascinating and entertaining read—will utterly change the way you think about lying.”
 

Scientific American, Guilty Planet blog
“Trivers is one of the greatest thinkers of our time.... Folly of Fools takes a refreshingly critical look at human behavior.... To fix some of the world's follies, we should lower the shield and better understand deception and our own self-deception by absorbing the wisdom, risky ideas, and generous admissions of his own foolishness in Robert Trivers' Folly of Fools. The truth can hurt, but deceit can, too.”
 
Tyler Cowen, Marginal Revolution blog
“Brilliant, insightful, with occasional lapses of taste, quintessential Trivers, now the go-to book on its topic, recommended.”
 
Kai Kupferschmidt, Science
“[Trivers is] an immensely original thinker in biology. His strength has been to see conflict where other people see only harmony.... Whereas others see optimism and self-deception as a defensive strategy to stay sane and happy in a harsh world, he sees it as a psychological attack mechanism, ‘fooling yourself to better fool others,' he says.”
 

Boston Globe
“Trivers's knowledge of a range of disparate subjects is impressive.... Zooming in from the evolution of group interaction to the adaptations of neurology, Trivers writes in depth about how poor our brains are at grasping anything that could be considered an ‘objective' reality. We're constantly fooling ourselves.”

Financial Times
“[O]riginal and important.... [The Folly of Fools] is a remarkable book, thick with ideas, yet relaxed and conversational in tone. Perhaps most remarkable is how ruthlessly Trivers confronts his own self-delusions…. If we all examined our faults and foibles as honestly as Trivers does, the world probably would, as he hopes, be a more decent place.”

The Daily
“Fascinating”

Science
“Engaging.... Disarmingly honest.... Trivers's book is a thoroughly good read. If his well-informed by modest approach starts a new trend, then The Folly of Fools is a welcome and rather unselfish meme.”
 

Kirkus Reviews (starred)
“Self-deception has long been a dark, opaque side of our behavior, but the author brings a bright flashlight to his investigation of why we alter information to reach a falsehood.... Trivers examines our biases and rationalizations, denials and projections, misrepresentation and manipulations, and his writing is comfortable and suasive, resulting from his familiarity and command of the subject's broad application and investigative history.... A gripping inquiry. Trivers is informal but highly knowledgeable, provocative, brightly humorous and inviting.”

Library Journal
“Looking at self-deception in broader areas like war, religion, false historical narratives, and even plane crashes, Trivers presents a convincing argument for why this type of dishonesty is as harmful to the individual as it is to society as a whole.... This provocative book examines an often unexamined subject, but one with which all readers are familiar. Recommended for professional social scientists as well as readers of popular science.”
 

Richard Wrangham, Professor of Biological Anthropology, Harvard University, and author of Catching Fire: How Cooking Made Us Human
“The problem of why natural selection favors self-deception is as poorly understood as it is riveting. Robert Trivers uses examples from insects to international relations to guide us to the fundamental logic. The result is a startlingly original and important book that should start a global conversation on a topic of both scholarly and personal interest.”
 
Richard Dawkins, emeritus Professor of the Public Understanding of Science, University of Oxford, and author of The Greatest Show on Earth
“This is a remarkable book, by a uniquely brilliant scientist. Robert Trivers has a track record of producing highly original ideas, which have gone on to stimulate much research. His Darwinian theory of self-deception is arguably his most provocative and interesting idea so far. The book is enlivened by Trivers' candid personal style, and is a pleasure to read. Strongly recommended.”
 

John Horgan, New York Times Book Review
“Trivers's scope is vast, ranging from the fibs parents and children tell to manipulate one another to the ‘false historical narratives' political leaders foist on their citizens and the rest of the world.... The Folly of Fools reminds me of other irreducibly odd classics by scientific iconoclasts.... May [Trivers's] new book give him the attention he so richly deserves.”

New York Times Book Review
“An intriguing argument that deceit is a beneficial evolutionary ‘deep feature' of life.”

Washington Post
“A celebrated evolutionary biologist, Trivers uses the tools of his trade to answer a basic question: Why are deception and self-deception so prevalent?.... The Folly of Fools assumes the unity of all nature and seeks to comprehend it not merely by observation and reason, but also by subjective impressions, intuition and imagination. And thus Trivers ranges across biology, anthropology, history and politics to find examples of deception and self-deception in action.”

Frans de Waal, C. H. Candler Professor, Emory University, and author of Our Inner Ape and The Age of Empathy
“Here a topic very few people think about, perhaps because the degree to which self-deception permeates our lives is itself subject to powerful denials. Robert Trivers, one of the brightest minds in evolutionary biology, leaves us little escape, however. No denying: an eye-opening read.”
 
William von Hippel, Professor of Psychology, University of Queensland
“Great books contain important new ideas, and this book is no exception. What makes Trivers' book unusual even among great books is the density of new ideas. Like other great popular press books in science, this book advances an important new idea in an entertaining and accessible manner. This book goes beyond that, however, by providing dozens of new hypotheses for those of us who have been laboring in this field for the last twenty years. In that sense, this book is not just exporting science to the lay public, but is also an important piece of scholarship.”
 

Trivers (Anthropology and Biological Sciences/Rutgers Univ.) searches for the evolutionary biology behind why "we are thoroughgoing liars, even to ourselves."

Self-deception has long been a dark, opaque side of our behavior, but the author brings a bright flashlight to his investigation of why we alter information to reach a falsehood. Because Trivers approaches the questions from the standpoint of evolutionary costs and advantages, his functional answer is that we lie to ourselves the better to lie to others, that through self-deception we hide reality from our conscious minds to make a better job of our often self-glorifying, self-justifying, self-forgiving deceptions. But through his research, the author has found self-deception to be a two-edged sword, with positive effects on our survival and reproduction, but negative effects on the immune system. He tenders evidence of self-deceit on all levels—gene, cell, individual and group—from the neurophysiological to parental subterfuge (and the child's subterfuge back) to sex (an absolute snake-pit of deceit and self-deception). Trivers examines our biases and rationalizations, denials and projections, misrepresentation and manipulations, and his writing is comfortable and suasive, resulting from his familiarity and command of the subject's broad application and investigative history. At the same time, the author is disarmingly intimate about his own self-deceptive weakness: "I have noticed that 'inadvertent' touching of women (that is, unconscious prior to the action) occurs exclusively with my left hand."

A gripping inquiry. Trivers is informal but highly knowledgeable, provocative, brightly humorous and inviting.