" The point of delineating between different kinds of migration is to draw a line between who has the right to move and who doesn’t – and in turn to identify which people should be prevented from moving in the first place. But, in reality, history proves that prevention may not be possible, and so too does the current crisis. People have always moved. The story of humanity is essentially the story of human movement. In the near future, people will move even more, particularly if, as some predict, climate change sparks mass migration on an unprecedented scale. The sooner we recognise the inevitability of this movement, the sooner we can try to manage it. "

― Patrick Kingsley , The New Odyssey: The Story of Europe's Refugee Crisis