James Fallon

James Fallon teaches neuroscience at the University of California Irvine, and through research explores the way genetic and in-utero environmental factors affect the way the brain gets built -- and then how individuals' experience further shapes its development. He lectures and writes on creativity, consciousness and culture, and has made key contributions to our understanding of schizophrenia, Parkinson's disease and Alzheimer's disease.

Only lately has Fallon turned his research toward the subject of psychopaths -- particularly those who kill. With PET scans and EEGs, he's beginning to uncover the deep, underlying traits that make people violent and murderous.