https://finance.yahoo.com/news/facebook-says-cant-guarantee-social-100000230.html

Facebook, the largest social network with more than 2 billion users, addressed social media's role in democracy in blog posts from a Harvard University professor, Cass Sunstein, and from an employee working on the subject.

"I wish I could guarantee that the positives are destined to outweigh the negatives, but I can't," Samidh Chakrabarti, a Facebook product manager, wrote in his post.