Yeah. I bet many would be surprised to learn that Margaret Sanger(the one whom is hailed) was a bitter woman out to stop inner city women from pro-creating(mostly black women). I'm thinking that would cause many to reconsider motives. But it is kept under wraps, like it was the plague.
Most of the individuals that were in the vanguard of the "family planning" movement-among a host of other progressive causes during the early 20th century-were notorious for their belief in the now-discredited, loathsome field of eugenics.