Eugenics was not just a science but a fad and a household word. It had powerful supporters, such as Alexander Graham Bell, John D. Rockefeller Jr., Margaret Sanger, and Teddy Roosevelt (some early supporters, including Bell, later renounced their affiliation, but Roosevelt was a long-hauler).
See! Just because he gave us National Parks, people try to give Teddy a pass. Guys - he kinda sucked.
