On May 1, 1776, a Bavarian law professor named Adam Weishaupt founded a small secret society with a radical ambition: to dismantle superstition, religious influence over public life, and aristocratic power through organized, covert enlightenment. The Order of the Illuminati lasted barely a decade before Bavarian authorities suppressed it—yet its afterlife in conspiracy, myth, and political imagination has endured for over two centuries. This book returns to the historical Weishaupt: his Jesuit education, his deep engagement with Enlightenment rationalism, and his meticulous organizational blueprint for the Illuminati's internal structure. Drawing on Weishaupt's own writings, intercepted correspondence published after the order's suppression, and contemporary historical scholarship, it reconstructs what the Illuminati actually were—a product of their moment, shaped by real political tensions in late eighteenth-century Europe. The result is a portrait of a man far more interesting than legend allows: a flawed idealist whose project reflected genuine Enlightenment contradictions between openness and secrecy, reason and control.