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Originally Posted by Andy6
That's true for most of the world with one enormous, elephant-in-the-room sized exception. The UN predicts that Africa's population will double between now and 2050 and double again from 2050 and 2100. The population of sub-Saharan Africa is projected at 4 billion by the end of the century, as opposed to 1 billion today. Nigeria will be closing in on China in population by then. So I wouldn't think that we've heard the end of immigration pressure, particularly in Europe.
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The tottering governments of Africa can barely deal with the demands of the current populations, much less a quadrupling of them. I feel that Africa will go one of two ways - either they will remake themselves in the fashion of China (which I consider unlikely given the issues with governance), or there will be very bloody wars on that continent the next few decades.