Concisely critiquing the internal contradictions and practical limitations of the social contract theory espoused by John Locke and John Rawls, Timothy Beach-Verhey presents a covenantal theory for political life based on H. Richard Niebuhr's theology of radical monotheism. Beach-Verhey challenges sectarian interpretations of Niebuhr's theology and cogently demonstrates that a properly understood, theocentric, covenantal social theory can unite a diverse people in a shared polity. In so doing, he shows how such an understanding of both liberal democratic practices and Christian norms can provoke both the moral vision and the virtues that are required for robust, open, and engaged public life. Robust Liberalism makes a powerful contribution to contemporary discussion of American public discourse.