Reynolds v United States I want to know about case law and legal precedent concerning the practice of polygamy and gay rights.
Reynolds concerned a religious argument that Polygamy was permitted under the 1st AM. It failed, as you know.
Review this case. It went to the United States Supreme Court. You can engine search Baker v. Nelson also for a Wikipedia article.
By affirming the MN SC decision, by a Summary decision, a 1st AM right to same sex marriages, along with others, including 14th, was struck down.