What a legend! A marvellous philosopher, I first came across him when watching a talk between The Four Horsemen (Dawkins, Hitchens, Harris and Dennett) which I watched during my Richard Dawkins frenzy of 2009. I didn't know who the names Hitchens, Harris and Dennett referred to (I guessed the guy with the beard was Harris for some reason). I've since watched a lot of talks given by him and think he's great, and he's got a few books I really want to read about consciousness and free will.

Themes of his work: evolution, artificial intelligence, religion/atheism, psychology.