In an online book titled “The Black Bloc Papers”, David Van Deusen of the Green Mountain Anarchist Collective makes clear that the Weathermen were the forefathers of the people who staged a riot at Berkeley:

The Black Bloc can trace its historical roots all the way back to when- and wherever people comprising an oppressed class or group militantly rose up against their oppressors. Elements of the particular tactics of the Bloc were previously utilized by the Weather faction of Students for a Democratic Society (the SDS) in North America during the “Days of Rage” in 1969.