Please elaborate why that matters; it was taught pretty early on in my bio major that ecosystem biodiversity is a positive, however, I haven't heard of anything relating directly to a species itself. Thanks.
That is: in homogeneous populations either a disease can kill/infect everyone, or no one. So, when it hits, it hits hard
(btw, this already happens with crops)
My question was directed upon the 'chimps vs humans' quote, and how relative genetic diversity matters (given that we don't take part in incest), not on the principle on which the potato famine occurred.