Given that WWII showed that race could be dynamite, it's surely astonishing that so many rich countries have permitted mass immigration by people who are not only of different race, but often of different religion. Even more astonishing that they've allowed some groups to keep immigrating even after the early arrivers from those groups have proved to be failures, economically or socially. Did anyone predict that 60 years ago?
Suppose I told you that I knew for a fact that the following statements were true:
You’d think I was crazy, right?
Now suppose it were the year 1901, and you had to choose between believing those statements I have just offered, and believing statements like the following:
Based on a comment of Robin Hanson’s: “I wonder if one could describe in enough detail a fictional story of an alternative reality, a reality that our ancestors could not distinguish from the truth, in order to make it very clear how surprising the truth turned out to be.”1
1Source: http://lesswrong.com/lw/j0/making_history_available/ewg.