Does the internet poison politics? It's been argued that the rise of "personalization," the use of algorithms to filter what you see online, and easy access to the like-minded, have served to reinforce our pre-conceptions. Is the information bubble a myth, or is it undermining civic discourse? Is the rise of social media really broadening our world views, or narrowing them? On the "for" side: Lawrence Lessig and Eli Pariser. On the "against" side: Evgeny Morozov and Jacob Weisberg.