The main barrier is the scientism that pervades our mentality and our culture. We are prone to think that if there’s a serious problem, science will find the answer. If science cannot find the answer, then it cannot be a serious problem at all. That seems to me altogether wrong. It goes hand in hand with the thought that philosophy is in the same business as science, as either a handmaiden or as the vanguard of science. This prevailing scientism is manifest in the infatuation of the mass media with cognitive neuroscience. The associated misconceptions have started to filter down into the ordinary discourse of educated people. You just have to listen to the BBC to hear people nattering on about their brains and what their brains do or don’t do, what their brains make them do and tell them to do. I think this is pretty pernicious – anything but trivial.