People gaze in disbelief at the cultural landscape — all the divorce, cohabitation, promiscuity, sexually transmitted disease, single moms, ill-mannered children, failing public schools, substance abuse, domestic violence, abortions, pornography and incivility — and can't fathom how America fell this far this fast. No one event triggered this devolution, but it undeniably was pushed along many times by the moral relativism of the last 50 years, when most of society's widely accepted norms were undermined by the quicksand of nonjudgmentalism; when the concepts of right and wrong, good and bad, were abolished in favor of differences that were to be...