Big Idea Books - What Are They About?

All of these books have in common, i would argue, they're all big idea books. All are in search of solving some kind of perennial problem that all of us, every human being, experiences. We're confused. There's so much information coming at us that it's very easy to fall into i'm never going to figure this out. I don't understand the way the world is. So what big idea books do is they're about the pursuit of getting to the bottom of something.