HackerTube / Video
Why Some Diseases Only Traveled One Direction
CGP Grey
CGP Grey explains why European diseases devastated the Americas while few deadly diseases traveled the other way. He ties it to livestock domestication, dense cities, and the ideas of Guns, Germs and Steel.
HN commenters point to it as a clear, short explanation of one-directional disease spread and the core argument of Guns, Germs, and Steel.
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