Stephen K. Sanderson is currently a visiting professor of sociology at the University of California, Riverside, where he specializes in comparative-historical sociology, sociological theory, and evolutionary sociology. He is the author or editor of ten books in sixteen editions, among them "Evolutionism and Its Critics: Deconstructing and Reconstructing an Evolutionary Interpretation of Human Society "(Paradigm, 2007) and "Revolutions: A Worldwide Introduction to Social and Political Contention" (2nd ed., Paradigm, 2010).