The American Civil Liberties Union (ACLU), founded in 1920, aimed to defend and preserve individual rights and liberties guaranteed to all people in the U.S. by the Constitution and laws. Its founding emerged from a reaction to the Red Scare and the suppression of civil liberties. The ACLU focuses on various issues, including free speech, religious freedom, racial justice, and privacy rights. It has played a pivotal role in numerous landmark cases, advocating for the rights of marginalized individuals and groups. The organization continues to be a significant player in the ongoing dialogue about civil rights and liberties in the country.