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).