On May 20, 1867, the British Parliament rejected by 196-73 an amendment to the 1867 Reform Act presented by John Stuart Mill that would have permitted women to vote. Review Mill's 1869 work The Subjection of Women.

On May 20, 1940, the United States Supreme Court held that the Free Exercise Clause of the First Amendment applied to state governments in Cantwell v. Connecticut under the incorporation doctrine, which applied the protections of the Bill of Rights to state governments through the Due Process Clause of the Fourteenth Amendment. Learn more about the Incorporation Doctrine from the Cornell Law Schools' Legal Information Institute.