Steven Pinker, a professor of psychology at Harvard, replied to my inquiry with a detailed critique of the A.P.A. guidelines.“The report is blinkered by two dogmas. One is the doctrine of the blank slate” that rejects biological and genetic factors, Pinker wrote, adding thatThe word “testosterone” appears nowhere in the report, and the possibility that men and women’s personalities differ for biological reasons is unsayable and unthinkable.The other dogma, Pinker argued,is that repressing emotions is bad and expressing them is good — a folk theory with roots in romanticism, Freudian psychoanalysis, and Hollywood, but which is contradicted by a large literature showing that people with greater self-control, particularly those who repress anger rather than “venting,” lead healthier lives: they get better grades, have fewer eating disorders, drink less, have fewer psychosomatic aches and pains, are less depressed, anxious, phobic, and paranoid, have higher self-esteem, are more conscientious, have better relationships with their families, have more stable friendships, are less likely to have sex they regretted, are less likely to imagine themselves cheating in a monogamous relationship.