In Theory of Religious Cycles: Tradition, Modernity and the Baha'i Faith Mikhail Sergeev offers a new interpretation of the Soviet period of Russian history as a phase within the religious evolution of humankind by developing a theory of religious cycles, which he applies to modernity and to all the major world faiths of Judaism, Buddhism, Christianity, and Islam. Sergeev argues that in the course of its evolution religion passes through six common phases--formative, orthodox, classical, reformist, critical, and post-critical. Modernity, which was started by the European Enlightenment,...