This accessible and authoritative introduction tells the American story of religious liberty from its colonial beginnings to the latest Supreme Court cases. The authors analyze closely the formation of the First Amendment religion clauses and describe the unique and enduring principles of the American experiment in religious freedom - liberty of conscience, free exercise of religion, religious equality, religious pluralism, separation of church and state, and no establishment of religion. Successive chapters map all of the 240+ Supreme Court cases on religious freedom - covering the free exercise of religion; the roles of government and religion in education; the place of religion in public life; and the interaction of religious organizations and the state. The concluding reflections argue that protecting religious freedom is critical for democratic order and constitutional rule of law, even if it needs judicious balancing with other fundamental rights and state interests. Clear, comprehensive, multidisciplinary, and balanced, this classic volume is an ideal classroom text. This new 5th edition addresses fully the new hot-button issues and cases on religious freedom versus sexual liberty; religious worship in the time of COVID; freedom of conscience and exemption claims; state aid to religion; religious monuments and ceremonies in public life; and the rights and limits of religious groups. In the inevitably contentious field of church-state constitutional issues in America, it is rare to find a volume that is as accessible, thoughtful, and measured as Religion and the American Constitutional Experiment by John Witte, Jr. and Joel A. Nichols. Their remarkable ability to create order in the midst of the chaos of the ever-changing constitutional law of religious liberty makes this an ideal volume for classroom use, and this new fourth edition updates the church-state story through the US Supreme Court s 2015 decisions.