A fresh assessment of Catholic integralism and other new and radical religious alternatives to liberal democracy. According to a common narrative, the twentieth century spelled the end of faith-infused political movements. Their ideologies, like Catholic integralism, would soon be forgotten. Humans were finally learning to keep religion out of politics. Or were we? In the twenty-first century, nations as diverse as Russia, India, Poland, and Turkey have seen a revival of religious politics, and many religious movements in other countries have proved similarly resilient. A new generation of political theologians passionately reformulate ancient religious doctrines to revolutionize modern political life. They insist that states recognize the true religion, and they reject modern liberal ideals of universal religious freedom and church-state separation. In this book, philosopher Kevin Vallier explores these new doctrines, not as lurid oddities but as though they might be true. The anti-liberal doctrine known as Catholic integralism serves as Vallier's test case. Yet his approach naturally extends to similar ideologies within Chinese Confucianism and Sunni Islam. Vallier treats anti-liberal thinkers with the respect that liberals seldom afford them and offers more moderate skeptics of liberalism a clear account of the alternatives. Many liberals, by contrast, will find these doctrines frightening and strange but of enduring interest. Vallier invites all his readers on a unique intellectual adventure, encouraging them to explore unfamiliar ideals through the lenses of theology, philosophy, politics, economics, and history.