It feels great to have your own views reflected back to you, and you feel so right, but actually it's very dangerous. Because to make good decisions, you need to have a clear view of what all the options are.

I think it's easier than ever to hear only what you want to hear. That doesn't make a good citizen.

Your computer monitor is a kind a one-way mirror, reflecting your own interests while algorithmic observers watch what you click.

In a broadcast society, there were these gatekeepers, the editors, and they controlled the flows of information. Along came the Internet and it swept them out of the way, and it allowed all of us to connect together, and it was awesome. But that's not actually what's happening right now.

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.

Your filter bubble is your own personal, unique universe of information that you live in online. What's in your filter bubble depends on who you are, and it depends on what you do. But you don't decide what gets in - and more importantly, you don't see what gets edited out.

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.