(So, all in all, it's not totally bad news...)
Or, how about the “Native” Americans practice of hunting bison by stampeding the herds over cliffs? They were doing a good job of exterminating them just as they had the mastodons, long before the nasty Europeans arrived.
The point is: Man has done some stupid things to the natural world, but Western civilization is not the cause.
Oh, I dunno. You have to make allowances for a culture that invented hominy cod.