What’s a topic or issue about which you’ve changed your mind?

I used to be an economic libertarian when I realized that the most productive countries that lifted themselves from nothing like South Korea, or Singapore did so thanks to tight state control and even expropriations that would be unthinkable elsewhere. I realized the free market is not always the holy grail. I am still in favour of letting people make money but the state need to have some vision and even control.