With Father's Day coming up, we should ponder the sad plight of the 20 million American children who are growing up without their fathers in the home. In 1993, Charles Murray identified "illegitimacy as the single most important social problem of our time ... because it drives everything else." Murray was whistling in the wind. Last year, the U.S. illegitimacy rate had grown to 41 percent, and among whites it was 29 percent. Prior to Lyndon Johnson's War on Poverty, husbands and fathers provided for their families. The 1.7 million out-of-wedlock babies born last year and their unmarried moms...