The document summarizes Nietzsche's theory on the origins and evolution of morality as presented in his work "Genealogy of Morals". According to Nietzsche, the concepts of "good", "bad", and "evil" originated as terms used by ruling noble classes to describe social status rather than moral concepts. Over time, the meanings evolved. The arrival of the priestly caste introduced the concept of the soul and changed "bad" to imply maliciousness. The priestly caste also led a "slave revolt" that inverted aristocratic morality by claiming the poor and suffering were good in the eyes of God. This new morality was born from resentment of the noble classes' freedom of expression. N