History's overflowing with examples of civilizations that fell because of climate change. Drought is the #1 culprit, with temperature change a close second, because they affect the food supply. The fate of the Harappa is only noteworthy because of the mysteries surrounding them. Getting run out of your own territory by climate change is pretty much standard.

It is too bad that you felt you had to post on Flame. I think that may be why your post didn't draw any comments until now...you promise only blood sweat and tears to anyone who might take up the subject. Too bad. Interesting article, and thanks for posting the link to it.