Although it is often charged with hostility toward religion, First Amendment doctrine in fact treats religion as a distinctive human good. It insists, however, that this good be understood abstractly, without the state taking sides on any theological question. Here, a leading scholar of constitutional law explains the logic of this uniquely American form of neutrality—more religion-centered than liberal theorists propose, and less overtly theistic than conservatives advocate.

The First Amendment’s guarantee of freedom of religion is under threat. Growing numbers of critics, including a near-majority of the Supreme Court, seem ready to cast aside the ideal of American religious neutrality. Andrew Koppelman defends that ideal and explains why protecting religion from political manipulation is imperative in an America of growing religious diversity.

Understanding American religious neutrality, Koppelman shows, can explain some familiar puzzles. How can Bible reading in public schools be impermissible while legislative sessions begin with prayers, Christmas is an official holiday, and the words “under God” appear in the Pledge of Allegiance? Are faith-based social services, public financing of religious schools, or the teaching of intelligent design constitutional? Combining legal, historical, and philosophical analysis, Koppelman shows how law coherently navigates these conundrums. He explains why laws must have a secular legislative purpose, why old, but not new, ceremonial acknowledgments of religion are permitted, and why it is fair to give religion special treatment.

Law and Religion in a Secular Age seeks to restore the connection between spirituality and justice, religion and law, theology and jurisprudence, and natural law and positive law by building a new bridge suitable for pluralistic societies in the secular age. The author argues for a multidimensional view of reality that includes legal, political, moral, and spiritual dimensions of human nature and society. Each of these dimensions of life needs to recognize the existence, influence, and function of the others, which act as a filter or check on the excesses of each other. This multidimensionality of reality clarifies why no legal theory can fully account for law from the legal dimension alone, just as no moral theory makes perfect sense of morality from the moral dimension—and, for that matter, nothing in physics can fully interpret the physical dimension of reality. The premises of a legal system cannot be fully explained by the legal dimension alone because the fundamental conditions and qualities of justice, freedom, and dignity touch all the dimensions of reality in which the human person acts, including the moral and the spiritual, not just the legal. Building on this multidimensional theory of reality, the author explores the core differences and the essential interconnections between law, morality, religion, and spirituality and some of the legal implications of these connections. Rafael Domingo reminds readers of the vital role of religion in shaping the conceptual framework of Western legal systems, underscores the spirit of Christianity that inspired legal institutions, principles, and values, and recalls the contributions of specific Christian jurists as central figures for the development of justice in society. Law and Religion in a Secular Age aims to be a valuable antidote against the dominant legal positivism that has cornered public morality, the defiant secularism that has marginalized religion, and any other legal doctrine that diminishes the spiritual dimension of law and justice.