In Social Evolutionism Stephen Sanderson provide a lucid account of a body of theory that has profoundly affected both intellectual and popular assumptions about human nature, society, and behavior. He describes the prominent and controversial role that evolutionary ideas have played in the development of social theory. He demonstrates the diversity of evolutionary ideas by comparing their notions of causation, their assumptions about human progress, and the adequacy of their modes of explanation and interpretation of evidence. Although he is highly critical of some aspects of evolutionary thinking and some modes of evolutionism, Professor Sanderson shows that an evolutionary interpretation of world history contributes vital insights about the character of human social life.