I was talking about the theory. I personally think that the best theory out there is Jared Diamond's (read "Guns, Germs, and Steel), that the success of a society is based largely on the geography and biology of its origin. I do not agree with Social Darwinism.

The idea of natural selection within human populations is another thing entirely. The laws of natural selection, that those most capable of reproducing flourish, remain true in any situation. It's only what is necessary to reproduce that changes. That's why I said that if it is a successful strategy not to use birth control, then we cannot institute universal population control without draconian measures, and that if it is an unsuccesful strategy, that population control will occur.