gladwell dot com: Tipping Point - The Mysteries of Mind-Reading: "Much of our understanding of mind-reading from two remarkable scientists, a teacher and his pupil: Silvan Tomkins and Paul Ekman. Tomkins was the teacher. He was born in Philadelphia, at the turn of the last century, the son of a dentist from Russia. He was short, and thick around the middle, with a wild mane of white hair and huge black plastic-rimmed glasses. He taught psychology at Princeton and Rutgers, and was the author of 'Affect, Imagery, Consciousness,' a four-volume work so dense that its readers were evenly divided between those who understood it and thought it was brilliant and those who did not understand it and thought it was brilliant."