Book excerpt: The acclaimed social psychologist and New York Times–bestselling author of The Art of Loving discusses the nature of evil and humanity’s capacity for it. Originally published in 1964, The Heart of Man was influenced by turbulent times. Average Americans were suffering from different forms of evil, including a rise in juvenile delinquency. On a grander scale, the threat of nuclear war loomed over the nation, and President John F. Kennedy had been assassinated. What could drive humanity to do things such as these? In The Heart of Man, renowned humanist philosopher and psychoanalyst Erich Fromm investigates man’s capacity to destroy, his narcissism, and his incestuous fixation. He expands upon ideas he presented in Escape from Freedom, Man for Himself, and The Art of Loving, and examines the essence of evil, as well as the choice between good and evil. He also explores man’s ability to destroy and further considers freedom, aggression, destructiveness, and violence. “The Heart of Man questions human nature itself, from the forms of violence that plague it to individual and social narcissism to how the positive value of “love of life” can potentially outweigh the destructive “syndrome of decay” caused by the love of death and other harmful tendencies of thought.” —Midwest Book Review