If you don't believe in God, you need to watch this! If you do believe in God, you need to watch this! Possibilianism by Dr. David Eagleman - Talk given at Poptech 2010. This may be the most sensible and important video you ever watch regarding the topic. Dr. David Eagleman is an American neuroscientist and writer at Baylor College of Medicine, where he directs the Laboratory for Perception and Action and the Initiative on Neuroscience and Law. He is also the writer and presenter of the six-hour television series, The Brain with David Eagleman on PBS.