Theory Of The Moral System: Including A Possible Reason Why Sin Exists (1855) is a philosophical treatise written by Ezra Hall Gillett. The book explores the nature of morality and attempts to provide a comprehensive theory of the moral system. Gillett argues that morality is not simply a set of rules or guidelines, but rather a complex system of values and principles that guide human behavior. He also explores the concept of sin and attempts to provide...