The really important victory of the civil rights movement was that it made racism unpopular, whereas a generation ago at the turn of the last century, you had to embrace racism to get elected to anything.
The fact is that the diversity in this political class serves the same interest as diversity in any arena, which is it stirs the competitive pot.
Magic lies in challenging what seems impossible.
The reason that minorities and women don't have a better shot at getting elected to the Senate or to statewide office is because the campaign finance rules are so skewed as to make it very difficult for non-traditional candidates to raise the money necessary to get elected.
I really think that's the key, part of the spiritual renewal that America needs to have, the notion that we really can have confidence in a better tomorrow.