In “The Righteous Mind,” Haidt seeks to enrich liberalism, and political discourse generally, with a deeper awareness of human nature. Like other psychologists who have ventured into political coaching, such as George Lakoff and Drew Westen, Haidt argues that people are fundamentally intuitive, not rational. If you want to persuade others, you have to appeal to their sentiments. But Haidt is looking for more than victory. He’s looking for wisdom. That’s what makes “The Righteous Mind” well worth reading. Politics isn’t just about manipulating people who disagree with you. It’s about learning from them.
Haidt seems to delight in mischief. Drawing on ethnography, evolutionary theory and experimental psychology, he sets out to trash the modern faith in reason. In Haidt’s retelling, all the fools, foils and villains of intellectual history are recast as heroes. David Hume, the Scottish philosopher who notoriously said reason was fit only to be “the slave of the passions,” was largely correct. E. O. Wilson, the ecologist who was branded a fascist for stressing the biological origins of human behavior, has been vindicated by the study of moral emotions. Even Glaucon, the cynic in Plato’s “Republic” who told Socrates that people would behave ethically only if they thought they were being watched, was “the guy who got it right.”