Founded in 1920, the American Civil Liberties Union (ACLU) is a nonprofit, nonpartisan, multi-issue, 1.4 million member public interest organization devoted to protecting the civil liberties of all people in the United States. Recognized as the nation's premier public interest law firm, the ACLU works daily in courts, legislatures, and communities to defend and preserve the freedoms guaranteed by the U.S. Constitution and the Bill of Rights. The ACLU dares to create a more perfect union beyond one person, party, or side, our mission is to realize the promise of the United States Constitution for all and expand the reach of its guarantees.