Today’s Internet giants — Google, Facebook, Yahoo and Microsoft — see the remarkable rise of available information as an opportunity. If they can provide services that sift though the data and supply us with the most personally relevant and appealing results, they’ll get the most users and the most ad views.
As a result, they’re racing to offer personalized filters that show us the Internet that they think we want to see. These filters, in effect, control and limit the information that reaches our screens.
And just last month, this technology began making inroads on the Web sites of newspapers like The Washington Post and The New York Times.
All of this is fairly harmless when information about consumer products is filtered into and out of your personal universe. But when personalization affects not just what you buy but how you think, different issues arise. Democracy depends on the citizen’s ability to engage with multiple viewpoints....
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