Baker v. Nelson, 291 Minn. 310 (Minn. 1971), 409 U.S. 810 (1972), was a case in which the Minnesota Supreme Court ruled that Minnesota law limited marriage to opposite-sex couples, and that this limitation did not violate the United States Constitution. The plaintiffs appealed, and the United States Supreme Court, 409 U.S. 810 (1972), dismissed the appeal "for want of [a] substantial federal question". That dismissal by the Supreme Court of the United States constituted a decision on the merits, and established Baker v. Nelson as the controlling precedent as a matter of federal constitutional law on the issue of same-sex marriage.