See How Facebook Labels You

Facebook has already labeled you very conservative, Or conservative. Or moderate, or liberal, or very liberal. It's all based on your "likes." It's how Facebook categorizes you for advertisers seeking like minds. It's Facebook's effort to be more transparent. 

Log on to Facebook first, then go to on your browser. Click on "your information," then "your categories." A U.S. Politics tab should show how they have pegged you. Are they accurate? 

It's a great example of the filter bubble of intellectual isolation. Or, even more sinister, the Overton Window