In Sex Revolution Sorokin argues that any significant change in the patterns of courtship; marriage; premarital, marital, and extramarital sexual relationships; and care of children would have significant consequences for society. Following J. D. Unwin's Sex and Culture, Sorokin asserts that societies tend to blossom, be creative, and grow when the sexual mores favor exclusivity, monogamy, fidelity, responsibility, and family stability. Conversely, when mores encourage permissiveness, sexual exploration, serial monogamy, easy divorce, and brief and changeable family relationships (particularly with children), then societies become unstable and alienating, and they decline.