The ideas of the Protestant Reformation, followed by the European Enlightenment, had a profound and long-lasting impact on Russia's church and society in the eighteenth century. Though the traditional Orthodox Church was often assumed to have been hostile toward outside influence, Andrey V. Ivanov's study argues that the institution in fact embraced many Western ideas, thereby undergoing what some observers called a religious revolution. Embedded with lively portrayals of historical actors and vivid descriptions of political details, A Spiritual Revolution is the first large-scale effort to fully identify exactly how Western progressive thought influenced the Russian Church. These new ideas played a foundational role in the emergence of the country as a modernizing empire and the rise of the Church hierarchy as a forward-looking agency of institutional and societal change. Ivanov addresses this important debate in the scholarship on European history, firmly placing Orthodoxy within the much wider European and global continuum of religious change.