Paul is a psychologist. He is the Brooks and Suzanne Ragen Professor Emeritus of psychology and cognitive science at Yale University and Professor of Psychology at the University of Toronto. His research explores how children and adults understand the physical and social world, with special focus on language, morality, religion, fiction, and art. His books include "Against Empathy" (making the case for rational compassion), "The Sweet Spot" (about the "pleasures" of suffering) and "Just Babies" (on the origins of good and evil).
Paul has published extensively on compassion and morality, including this paper "Children prioritize humans over animals less than adults do" co-authored with previous Sentientism guest Matti Wilks. His moral scope is unclear and he doesn't yet seem to have boycotted consumption of sentient animal products. He is an atheist and has a naturalistic worldview, rejecting supernatural beliefs.