The ideas sketched here concern the nonestablishment and free exercise norms expressed in the U.S. Constitution, their application to governmental institutions from legislatures to prisons and the military, the place of religion in the curricula of public schools, and the proper role of religious convictions in lawmaking. A major concern of the essay is the problem of achieving an appropriate balance between governmental neutrality toward religion, as required by the nonestablishment norm, and governmental accommodation of religious practices that would otherwise violate ordinary laws, as required by the free exercise norm. A recurring theme is the complexity of the issues and the variability of possible solutions given differences in the history and culture of democratic societies.