When we go online, each of us is our own editor, our own gatekeeper. We select the kind of news and opinions that we care most about.

Nicholas Negroponte of M.I.T. has called this emerging news product The Daily Me. And if that’s the trend, God save us from ourselves.

That’s because there’s pretty good evidence that we generally don’t truly want good information — but rather information that confirms our prejudices. We may believe intellectually in the clash of opinions, but in practice we like to embed ourselves in the reassuring womb of an echo chamber…

One 12-nation study found Americans the least likely to discuss politics with people of different views, and this was particularly true of the well educated. High school dropouts had the most diverse group of discussion-mates, while college graduates managed to shelter themselves from uncomfortable perspectives.