Was planned parenthood founded to stop blacks from having children?

No. Margaret Sanger started Planned Parenthood after she saw a woman die from abortion. She then started the first clinic to provide Birth Control which then was illegal and she went to prison for it. After she got out she continued and the only permanent birth control they had then was sterilization. That was what saved many families from poverty. And the poorest were often the black people. This is why her clinic was in a black neighborhood. They had big families and the children could not go to school because they had to work. So the black women were happy to have a way to control how many children they would have. That was the best way to get out of poverty - to send the kids to school and not have more children. Sanger did not force them to, they were smart and saw the solution. Many of them worked with her in her clinic. None of them had birth control so there was no other way to control it and abortion was illegal and something Sanger was deeply against, and also highly dangerous.