This volume in the Millennialism and Society series focuses on theoretical approaches to the apocalyptic, past and present. Not since Norman Cohn’s The Pursuit of the Millennium has there been such a profound theoretical exploration of millennial themes, coupled for the first time with a strong comparative dimension. Essays theorize the apocalyptic as it has arisen in a variety of religious traditions from Islam to Native American religion, drawing upon and engaging in a reflexive critique of theories from social psychology, sociology, and post-modern philosophy to do so.