Del Cecchi > wrote in
:

> And the blight that ravished Ireland, long before GM or whatever?
> Or the pest that wrecked the grapevines in france?
>
> Or Dutch Elm Disease, or the disease that killed all the wild
> American Chestnuts?

One would have to look, but each was probably had some connection to
loss of diversity. How is it that species survived in great varieties
before these occurences? There must have been blights then too. The
quality of genetic diversity is that some benefit while others suffer.
If you only have one variety left, the entire species can disappear.

--

"Compassion is the chief law of human existence."

Dostoevski, The Idiot