The thesis of this article explores the idea:

"After studying how people shared 1.25 million stories during the campaign, a team of researchers at M.I.T. and Harvard implicated Facebook and Twitter in the larger failure of media in 2016."

This is one problem, but according to Nicholas Carr the problem might be deeper and more fundamental : "free-flowing information makes personal and cultural differences more salient, turning people against one another instead of bringing them together."

http://www.bostonglobe.com/ideas/2017/04/21/how-technology-c...