A psychiatrist that goes by pen name Scott Alexander, also known as Yvain on Less Wrong. He wrote quite a lot of insightful articles over the year; here's one reference[0].

My favourite work of his is Meditations on Moloch[1] - quite long but very good post about how various coordination problems make the world look the way it was, and how it may evolve in the future.

[0] - http://nothingismere.com/2015/09/12/library-of-scott-alexand...

[1] - http://slatestarcodex.com/2014/07/30/meditations-on-moloch/