It's far more likely that the US isn't breaking up Google or Facebook because they aren't monopolies in the traditional sense, and even if they were, US anti-trust law has been neutered by decades of classical liberalism.
Ok, thanks for clarifying. I wonder how all this is going to unfold in the next 3-5 years. Rereading 'Zero To One' makes me feel that Mark Zuckerberg is not going to make this an easy fight for anyone trying to limit Facebook.
