Students for a Democratic Society (SDS) was a US student activist organization during the 1960s that disdained hierarchical government and promoted participatory democracy.

In 1962 the SDS manifesto, known as the Port Huron Statement, was adopted at the University of Michigan campus in Ann Arbor.The statement was a broad critique of the political and social system of the United States for failing to achieve international peace and economic justice.

The statement issued a non-ideological call for participatory democracy, based on non-violent civil disobedience and the idea that individual citizens could help make the social decisions which determined their quality of life.

Source: Wikipedia