Radical evil

Radical evil is the persistent propensity toward evil that, in the book’s reading of Kant, is inscribed in human nature and cannot be abolished. It is not a temporary defect that a perfected society could remove. Its philosophical force is to expose the limits of moral schemes that promise harmony between human nature and ethical law, and to leave freedom confronting an abyss with no guarantee in the order of being.

Meaning and Ethical Limit

Kantian radical evil names a tendency within human beings, not merely the occurrence of particular immoral acts. A society in which this propensity had been overcome, so that moral law no longer conflicted painfully with natural self-interest, would not represent a realizable ethical ideal. The proposal to harmonize human nature with ethical demands is, in this account, meaningless—or a dangerous angelic temptation—because it imagines that the conflict can be abolished once and for all.

Actual society therefore remains a compromise between two lethal extremes: complete ignorance of moral rules and a complete absence of their violation. The first would leave norms without force; the second would imply that the tension between law and human conduct had vanished. Symbolic norms are necessary even though they cannot be perfectly followed. Radical evil marks the persistence of that discrepancy rather than offering a problem that moral improvement can finally solve.

Nature as an Unstable Explanation

The appeal to nature does not resolve this difficulty. In the book’s account, both Kant and Marquis de Sade invoke nature in ways that reveal an unresolved ambiguity. Kant first treats nature as the phenomenal whole governed by universal laws, then also describes a noumenal nature: a community of rational beings ordered toward ethical ends. In this second sense, the excess of freedom over natural causality is, paradoxically, given another natural form.

Marquis de Sade begins from a different conception: nature is indifferent matter, undergoing change without a divine master. Yet his account of destructive pleasure also attributes to nature an inner demand that people pursue evil, destroy others, and interrupt reproduction. Nature thus shifts from an indifferent process to something like a transgressive command. The two accounts are not identical, but each supplements neutral nature with an ethical or anti-ethical order that makes its position appear more secure than it is.

The ambiguity persists in the question of what gives the Sadeian hero pleasure. It might be the apparent return to nature’s unconstrained destructive course; it might instead be the knowledge that the act violates moral law. The book leaves this tension irreducible. In both Kant and Marquis de Sade, the second, charged meaning of nature can function as a retreat from the more disturbing possibility that freedom has no ontological guarantee.

Freedom, Law, and the Sadeian Symptom

Kant’s ethical revolution, as interpreted here, cannot be reversed by restoring older prohibitions. Freedom no longer depends on a pre-existing rule against which it can define itself: limitations are self-posited, and the deadlock of freedom emerges with that autonomy. Attempts to reinstate old values by imposing prohibitions that can no longer be taken seriously become, in the book’s analysis, a failed perverse strategy. Radical evil consequently cannot be explained away by appealing either to an innocent nature or to a stable moral order outside freedom.

This argument also reverses a familiar reading of the relation between Kant and Marquis de Sade. Sadeian perversion is not simply the more radical truth that Kant lacked the courage to acknowledge. Rather, Marquis de Sade becomes Kant’s symptom: the obscene figure who exposes the compromise Kant makes by not following his ethical breakthrough to its full consequences. The apparent extremity of the will to enjoy therefore conceals its dependence on the very compromise it seems to surpass.

Ontological Significance

The account of radical evil belongs to a wider argument against treating contradiction as a merely epistemological obstacle that could be overcome by discovering a fully consistent reality behind appearances. Hegel’s reversal is to locate incompleteness in reality itself: the gap is not only a limitation in what can be known, but a feature of what is. Applied cautiously to radical evil, this framework clarifies why the conflict between ethical law and human propensity is not presented as a temporary disturbance awaiting reconciliation. Its persistence reveals a structural limit, not a missing final harmony.

The result is not a defense of evil, nor a claim that every transgression expresses freedom. It is a refusal of reassuring explanations that make freedom answerable to a complete natural or moral order. Radical evil matters because it keeps the ethical problem open: norms remain necessary, their perfect fulfillment cannot be made the condition of social life, and freedom cannot evade its lack of an ultimate guarantee.