At the heart of the SDS was the Port Huron Statement. See more on Wikipedia, and the text follows. Or maybe this is the full text here.
The awe inspired by the pervasiveness of racism in American life is only matched by the marvel of its historical span in American traditions. The national heritage of racial discrimination via slavery has been a part of America since Christopher Columbus’ advent on the new continent. As such, racism not only antedates the Republic and the thirteen Colonies, but even the use of the English language in this hemisphere. Our work is guided by the sense that we may be the last generation in the experiment with living. But we are a minority — the vast majority of our people regard the temporary equilibriums of our society and world as eternally-functional parts. We regard men as infinitely precious and possessed of unfulfilled capacities for reason, freedom, and love. The decline of utopia and hope is in fact one of the defining features of social life today. The reasons are various: the dreams of the older left were perverted by Stalinism and never recreated . . . the horrors of the twentieth century, symbolized in the gas-ovens and concentration camps and atom bombs, have blasted hopefulness. To be idealistic is to be considered apocalyptic, deluded. “The apathy here is, first subjective — the felt powerlessness of ordinary people, the resignation before the enormity of events. But subjective apathy is encouraged by the objective American situation — the actual structural separation of people from power, from relevant knowledge, from pinnacles of decision making. . . . The American political system is not the democratic model of which its glorifiers speak. In actuality it frustrates democracy by confusing the individual citizen, paralyzing policy discussion, and consolidating the irresponsible power of military and business interests.”