Since its inception in the early 20th century, neuroscience has taught us a tremendous amount about the brain. Our sensations have been reduced to a set of specific circuits. The mind has been imaged as it thinks about itself, with every thought traced back to its cortical source. The most ineffable of emotions have been translated into the terms of chemistry, so that the feeling of love is just a little too much dopamine. Fear is an excited amygdala. Even our sense of consciousness is explained away with references to some obscure property of the frontal cortex. It turns out that there is nothing inherently mysterious about those 3 pounds of wrinkled flesh inside the skull. There is no ghost in the machine. The success of modern neuroscience represents the triumph of a method: reductionism. The premise of reductionism is that the best way to solve a complex problem — and the brain is the most complicated object in the known universe — is to study its most basic parts. The mind, in other words, is just a particular trick of matter, reducible to the callous laws of physics. But the reductionist method, although undeniably successful, has […]