There are a few points to make here. First, it is a dangerous assumption to make dance music cannot also be thought provoking. Curtis Mayfield, Stevie Wonder, War, and others made lots of cerebral music with a good beat. As for a flower child waving arms, by Black standards, that is not dancing at all! I never said that Blacks are the only people to dance in history, but dancing is central to the way music is experienced by the black masses. Your examples of Latino culture actually reinforces my argument because all of the great Latin dance music has African roots that are even more undiluted than much of African American music.