All political scientists. Here's Larry Summers:
"After Brexit, Trump, Sanders and the misforecast British and Canadian general elections, it should be clear that the term political science is an oxymoron. Political events cannot be reliably predicted by pollsters, pundits or punters. All three groups should have humility going forward. In particular no one should be confident about the outcome of the U.S. presidential election."
https://www.washingtonpost.com/news/wonk/wp/2016/06/24/whats-crucial-to-know-the-morning-after-brexit/Plenty of Political Science predicted the eventual crackup of Europe. Another thread talks about how Mearsheimer has predicted it so relentlessly that eventually he had to be right, but he was far from the only one. If you take nationalism seriously, or social ties, then there are strong implications that Europe as a project is doomed.
Just because Larry and you (apparently) are ignorant of those scholars doesn't mean they aren't there.
There is "prediction," and then there is the phenomenon known as "self-fulfilling prophecy." Do not confuse the two.