This document discusses religious organizations and the law under the American constitutional system. It summarizes that the First Amendment protects both free exercise of religion and prohibits establishment of religion. There are three key areas of constitutional consideration: free exercise, establishment, and separation of church and state. Religious groups organize themselves both internally according to beliefs and through legal structures to receive benefits. Disputes over religious property led to Supreme Court cases establishing groups must be treated equally under law but also differently due to religious nature.