Students for a Democratic Society (SDS) was a student activist organization founded in 1960 that played a significant role in the anti-war movement during the Vietnam War. The group was known for its advocacy of participatory democracy, social justice, and opposition to U.S. military involvement in Vietnam, which resonated with the broader youth culture of the time. SDS organized protests, sit-ins, and other forms of activism, making it a central player in the fight against the war and for civil rights.