Dont forget Woodrow Wilson resegregating the civil service which essentially approved and laid the groundwork for the next 50 years of racial division.
Had this not occurred, state and local attempts to promote an American apartheid would have fallen flat on their face, by the time the 60s rolled around there probably wouldnt have been a civil rights movement because racial segregation would have been a quaint absurdity and institutions and agencies that attempted it would have been called out as the assholes they are...
Good addition.