Personalization is based on a bargain. In exchange for the service of filtering, you hand large companies an enormous amount of data about your daily life--much of whic you might not trust your friends with.

There's the idea that people should be able to control how the information that they're giving to websites is used and monetized in a more clear and powerful way. That's something that probably will need government action.

To be a good citizen, it's important to be able to put yourself in other people's shoes and see the big picture. If everything you see is rooted in your own identity, that becomes difficult or impossible.

It's a civic virtue to be exposed to things that appear to be outside your interest. In a complex world, almost everything affects you – that closes the loop on pecuniary self-interest. Customers are always right, but people aren't.

A world constructed from the familiar is the world in which there's nothing to learn.

There's the part that I just want what I want, and I don't want to be bothered by anything else, and sort of the short-term more compulsive self. And then that's the longer-term, aspirational self that wants to be informed about the world and wants to be a good citizen. The best media basically helps us strike a balance between those two things.

If you Google some sites about the link between vaccines and autism, you can very quickly find that Google is repeating back to you your view about whether that link exists and not what scientists know, which is that there isn't a link between vaccines and autism. It's a feedback loop that's invisible.