Marriage reflects the natural moral and social law evidenced the world over. As the late British social anthropologist Joseph Daniel Unwin noted in his study of world civilizations, any society that devalued the nuclear family soon lost what he called "expansive energy," which might best be summarized as society's will to make things better for the next generation. In fact, no society that has loosened sexual morality outside of man-woman marriage has survived.
Analyzing studies of cultures spanning several thousands of years on several continents, Chairman of Harvard University’s sociology department, Pitirim Sorokin. found that virtually all political revolutions that brought about societal collapse caused by homosexuality.