> it wasn't so easy to poke your head out and see really different worldviews. With the internet, it's easy. That doesn't really matter if nobody does it -- a

> it wasn't so easy to poke your head out and see really different worldviews. With the internet, it's easy. That doesn't really matter if nobody does it -- and it turns out to be even easier to find (& stay in) communities that simply echo & reinforce your worldview. As for the rest, I think you're just being contrary for the sake of being contrary. It seems fairly obvious that one of the least intellectually healthy things out there, from individuals all the way up to societies, is to be surrounded solely by people who agree with you. Isolation breeds ignorance and extremism.