By Jonathon Van Maren, LifeSiteNews - In 1934, Oxford anthropologist J.D. Unwin published his mammoth magnum opus Sex and Culture, a study of 80 primitive tribes and six civilizations over five millennia. According to Unwin, these case studies prove that when cultures become wealthy, they correspondingly loosen their standards of sexual morality. As a result, societies lose their cohesion as well as their purpose and drive. In short, the success of a society is, according to Unwin, directly tied to the sexual restraint they exercise.