In his welcome Washington Post "Outlook" piece, “Disappearing Act: Where Have the Men Gone? No Place Good,” Michael Gurian reports that colleges and universities across the country are “grappling with the case of the mysteriously vanishing male.” The author of books on the compelling brain research that reveals significant sex differences in learning styles notes that men make up only 43 percent of college students. Gurian laments that we have failed to react to a “significant crisis” that damages the life prospects of millions of young men. He marshals the evidence of boys in trouble and effectively demands attention...