[zerostar07]

hasnt diversity already been reduced by transportation? didnt it prove to be a bad things for american indians?

[p10_user]

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

[hutzlibu]

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.