A man learns masculinity primarily from his father. But generations of boys who grow up without caring fathers or male mentors to emulate are left to guess what "men" are really like. They rely on cultural icons--larger-than-life images--as models of masculinity. As a result, they grow up mirroring overblown myths of manhood. Obsessed with being "man enough," they become philanderers, controllers, and competitors--constantly overcompensating for their loss of a true role model, yet sorely unprepared for family life.

In Man Enough,...