SOCIAL HISTORY: U.S. VIDEO LINKS

  "Human Zoos: America's Forgotten History Of Scientific Racism," 2018 (55 mins):

  "Chapter 1, The Polio Crusade," American Experience, PBS, 2020.  (10 mins)

  "Silicon Valley," American Experience, PBS  -- Part 1 (40 mins);  Part 2 (44 mins):