Physicalism is the idea that if everything that goes on in the universe is physical, our consciousness and feelings must also be physical. Ever since Descartes formulated the mind-body problem, a long line of philosophers has found the physicalist view to be preposterous. According to John Perry, the history of the mind-body problem is, in part, the slow victory of physical monism over various forms of dualism. Each new version of dualism claims that...