The mid-20th-century “Great Migration” from the American South numbered only 6 or 7 million, but it still destroyed Detroit. The much greater migration heading from Africa to Europe will likely do far worse. The cities of Europe that survived the Second World War are probably the greatest works of arts of humanity, but, under present trends, they are going to be inundated by immigrant Africans, turning Florence into Ferguson, Barcelona into Baltimore, and Edinburgh into East St. Louis.
There’s little need for this impending destruction. Africa is a vast continent with, as Pinker suggests, plenty of room to grow far more food than it does now. But Africans are a threat to overwhelm Europe (and, eventually, the rest of the Western world) because our culture is increasingly sacralizing blacks, with the worst sin being to speak realistically of their strengths and weaknesses.
This doesn’t have to happen.