The link below is to a TED Talk by Allan Savory. It is, I think, one of the most important Talks to ever hit the Internet because, once you consider its ramifications it explains a LOT of things that just never seemed to make sense before now. At least, to me. Like the true causes of war, overpopulation, and human migration. Like why our planet is dying. Like why overpopulation and climate change are not really the problem. Why they are, in fact, only symptoms of the problem. Allan Savory is a biologist who became concerned with "desertification". He wanted to understand why so many parts of the world were turning into deserts. Why half the planet was dying at an unprecedented rate. It isn't due to "climate change", although climate change certainly exists. The real problem is what drives climate change. And that turns out to be something I never expected. Overpopulation is not too many people. It's too many people for a given area to support. War is what happens when the have-nots decide to share with the haves, or when the haves decide not to share with the have-nots. If no one needed to share, there wouldn't be any have-nots. Mass migration is what happens when people decide they would rather live somewhere else than die where they live. Climate change is the sum of a very large number of local ecological catastrophes. The macro-climate is just the sum of all the micro-climates. By way of analogy, "disease" is just the sum of all the infected cells of an organism. I think one element of overpopulation is a human instinct to breed as fast as possible when conditions are inhospitable., just to improve the odds that at least some of the offspring may survive. That's a very common tactic in nature. If there were no deserts--if the entire earth was green and bountiful--there would be no need for crisis breeding. Then (and only then) perhaps humans could live in balance with nature.