"The book was probably written by a Chicago physician and student of Freud named William Sadler who had already been involved in other cults. … Sadler was interested in race eugenics, a field of study that seeks to remove "inferior" kinds of people from the gene pool. One of Sadler's favorite books before The Urantia Book was Madison Grant's The Passing of the Great Race, which says that nordic people are the "ideal" human race and "getting rid of" other races would "enable us to get rid of the undesirables who crowd our jails, hospitals, and insane asylums.""