"The Genealogy of Morals" by Friedrich Wilhelm Nietzsche is a philosophical work published in 1887. Consisting of three interrelated treatises, it traces the evolution of moral concepts to challenge what Nietzsche views as moral prejudices, particularly those of Christianity and Judaism. Through historical analysis, Nietzsche examines how opposing value systems—"good and evil" versus "good and bad"—emerged from different social classes. He explores the aristocratic morality of the powerful and the "slave morality" born from resentment, revealing how values became inverted throughout history.