What is On the Genealogy of Morality about?

On the Genealogy of Morality is Nietzsche's most rigorously argued work — three sustained essays that trace the historical origins of moral concepts he believes we have inherited without examining. Published in 1887, it supplements Beyond Good and Evil by providing the genetic analysis that the earlier work sketched. The project is explicitly anti-philosophical in the sense that it refuses to ask "what is the true meaning of good and evil?" and instead asks "how did these concepts come to mean what they mean, and what needs did they serve?"

The first essay examines the origin of the opposition between "good and evil." Nietzsche argues that the original distinction was between "good" and "bad" — a noble self-affirmation, where "good" names the qualities of the strong (nobility, power, health) and "bad" is simply their absence. The slave revolt in morality inverted this: the weak, unable to overcome the strong, instead reframed their weakness as virtue and the strength of the noble as "evil." This is ressentiment — reactive, creative from below, requiring an enemy to define itself against. The result is the Christian-descended morality that currently dominates Europe.

The second essay traces guilt, bad conscience, and the concept of debt. Nietzsche argues that guilt (Schuld) has its origins in creditor-debtor relationships — the pain of the debtor who cannot repay. The internalization of this debt, when external punishment became impossible, produced bad conscience: a self-torture of repressed instincts turned against the self. Christianity, on this account, took this pre-existing psychological structure and maximized it: the human being as eternally indebted to God, a debt so great it could only be paid by God himself.

The third essay analyzes the ascetic ideal — the value of self-denial, poverty, chastity, and humility promoted by priests, philosophers, and artists. What does it mean for life itself to promote the conditions that deny life? Nietzsche's answer is that the ascetic ideal is itself a form of will to power: the will finding something to will in the absence of other options, turning against life rather than willing nothing at all. It is life's way of preserving itself in conditions where self-directed willing is blocked.