dualism. 1  the state of being dual or consisting of two parts; division into two. 2  Philosophy. the view that there are just two mutually irreducible substances. 3  Theology. the doctrine that there are two independent divine beings or eternal principles, one good and the other evil. the belief that a human being embodies two parts, as body and soul.
Thomas Sully was an early American painter, born in Lincolnshire, England. He immigrated to the United States with his parents at the age of nine, and as a young man initially worked for an insurance broker in Philadelphia. However, Sully was passionate about art and when he was 16, Sully joined his brother, a miniaturist, in Virginia.
Sulley is a top scarer under his boss Henry J. Waternoose, III, who is the CEO of Monsters, Inc. Sulley's best friend and sidekick is Mike Wazowski. His mother is Mrs. Sullivan (who is not seen in the movie, but mentioned by Mike) and his dad is the famous scarer Bill Sullivan. When he is first seen, Sulley is the top scarer at Monsters, Inc., responsible for generating the majority of scares that provide power for the city of Monstropolis.