Today, most Black Power advocates have not changed their self-sufficiency argument. Racism still exists worldwide, and some believe that blacks in the United States, on the whole, did not assimilate into U.S. "mainstream" culture. Blacks arguably became even more oppressed, this time partially by "their own" people in a new black stratum of the middle class and the ruling class. Black Power's advocates generally argue that the reason for this stalemate and further oppression of the vast majority of U.S. blacks is because Black Power's objectives have not had the opportunity to be fully carried through.