Marc Lewis, PhD, is a neuroscientist and recently retired full professor of developmental psychology, at the University of Toronto from 1989 to 2010, and at Radboud University in the Netherlands from 2010 to 2016. He is the author or co-author of over 50 journal publications in psychology, cognitive science, and neuroscience, editor of an academic book on developmental psychology, and co-author of a book for parents. More recently he has written two books on the science and experience of addiction.