Read Planned Parenthood’s founder, eugenicist Margaret Sanger, in her own words in Pivot of Civilization, which you can download for free in various formats from Project Gutenberg. (I was so disappointed to see that H. G. Wells wrote the Introduction for Pivot. I hadn’t known that he was a eugenicist.) And be sure to read Grand Illusions: The Legacy of Planned Parenthood. Available in PDF or HTML. I’m still reading these and they’re both on my list to review.