This Article is an appreciative review of a new masterwork on religious freedom by leading constitutional scholar, Kent Greenawalt. The book crisply summarizes the full range of founding principles of religious liberty in America – liberty of conscience, freedom of exercise, religious diversity and equality, separation of church and state, and disestablishment of religion – and calls for their proper balancing still today. It then lucidly analyzes the main American cases, statutes, and regulations that bear on the free exercise of religion. Greenawalt calls on courts to accommodate maximum expressions of religious conviction that are consistent with commitment to fairness and public welfare. He rebukes the Supreme Court’s reductionist readi...