Sam Nelson is an historical sociologist who specializes in themes of secularization, religious change, religious organizations, religion and state-formation, and in the intersection of religion and politics. His research focuses on Christianity and European empires, early Protestant overseas missions, and the religious-organizational transformations associated with the rise of evangelical revivalism. He is currently working on a monograph, entitled Organizing the Global Millennium, on the imperial and missionary dimensions of the rise of evangelical Protestantism in the 18th century.