If you are interested in the articles below you may perhaps also be interested in the book "Towards a Science of States: their Evolution and Properties".
We are now, since some years, witnessing migration streams of people of an extraordinary magnitude, length, complexity and dispersion. Here and now I will try to discuss in some detail the causes of these streams. I have started a project like that earlier without bringing it to an end. Now I will however start from the beginning again, and the reason for that is that complete figures from 2017 are now available, figures that not only add one more year but also throw some extra light on the whole period discussed and analyzed.