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Re:China, Unhampered by Rules, Races Ahead in Gene-Editing T... by p10_user on Tuesday January 23, 2018 @12:41AM (#16211302)
The opposite is true - transportation has increased diversity. The American Indians suffered due to a lack of exposure to diseases (smallpox) common in Europe due to their relative isolation
Re:China, Unhampered by Rules, Races Ahead in Gene-Editing T... by hutzlibu on Tuesday January 23, 2018 @05:27PM (#16218422)
Erm ... that's also a way to put it. Another way to put it, they would not have suffered if not for rapid transportation.

But genetic diversity did increased - through mating.