Roger Baldwin, a prominent lawyer and activist, founded the American Civil Liberties Union (ACLU). Established in 1920, the ACLU emerged in response to the growing threats against civil liberties in the United States, particularly during periods of political repression. Baldwin’s unwavering commitment to defending the rights of individuals, including freedom of speech and assembly, helped shape the organization’s mission. Under his leadership, the ACLU has played a crucial role in advocating for civil rights and protecting liberties that remain relevant today.