Yes, but

Anonymous has left a new comment on your post "Not so ridiculous...":

Genetic diversity can also have a downside, medically: For example, it is known that mixed race people are difficult to treat via an organ transplant -- it is much, much more difficult to find a suitable donor for them.

Ben's response:

I didn't know that. Interesting indeed.

But too pure a stock also yields (greater ? ) problems: Inbred diseases like hemophelia etc.

Ben