When it imposes expensive regulatory mandates on the private sector, Congress often acts on the basis of interest-group pressures, anecdotes, and the emotions of the moment. The executive branch is hardly perfect, but it is far less likely to do that.

Research shows that if people are talking and listening to like-minded others, they become more dogmatic, more unified, and more extreme. Personalized Facebook experiences are a breeding ground for misunderstanding and miscommunication across political lines and, ultimately, for extremism.

If a major source of the nation's news is personalizing user experiences, people with different points of view will end up in echo chambers of their own design. Facebook didn't create that problem, but it shouldn't aggravate it.

Cass Sunstein Quotes