This document discusses the 1879 Supreme Court case Reynolds v. United States, which addressed whether religious belief could justify illegal action. Specifically, it examined whether Mormon beliefs supporting plural marriage were protected under the First Amendment. The Court ruled that while belief is protected, religious practices can be regulated by the state if they threaten public peace or morality. Polygamy was deemed an offense against society and patriarchal in nature. Therefore, religious belief did not except one from having to follow the law.