Ask HN: What books changed the way you think about almost everything?

I was reflecting today about how often I think about Freakonomics. I don't study it religiously. I read it one time more than 10 years ago. I can only remember maybe a single specific anecdote from the book. And yet the simple idea that basically every action humans take can be traced back to an incentive has fundamentally changed the way I view the world. Can anyone recommend books that have had a similar impact on them?