“The black illegitimacy rate in 1962 was 20-25%
The white rate was .5-2%”
That sounds about right to me. What really blew up the black rate was the soon to arrive Lyndon Johnson Great Society programs that effectively paid women to be single mothers. IIRC Daniel Patrick Moynihan gave a speech warning about that.
And about the same time The Pill hit American culture like a bomb and sexual mores got a whole lot looser just as Boomers were growing up.. and then Roe v Wade threw gas on that fire
That was basically the point Artemis Webb and I were making (or trying to, unsuccessfully) that The Great Society didn’t cause those issues originally, it just greased the skids to bring it to where it is now, which we can all agree is extraordinarily corrosive and destructive to our society.