Michael Eric Dyson, the Georgetown sociology professor and public intellectual, talks here about how civil rights movements have historically built upon one other. MLK took pieces from Gandhi, and the gay rights movement is now drawing on the black civil rights movement of the 60s. The clip runs about 7 minutes, and you can watch the full video here. You can also watch another Dyson speech, "No Dreams Deferred?: Black Aspirations from Martin Luther King Jr. to Jay-Z."