Deontological Ethics

Kant and the Ethics of Respect

Christopher L. Holland

Saint Louis University

April 29, 2025

Consequentialism
vs. 
Deontological Ethics

Consequentialism

  • consequences alone determine moral right and wrong
  • moral imperatives are hypothetical imperatives
  • the good is prior to the right

Deontological Ethics

  • consequences alone do not determine moral right and wrong
  • at least some moral obligations are unconditional/categorical
  • at least some moral imperatives are categorical imperatives
  • the right is prior to the good

Deontological Ethics

Moral obligations are unconditional/categorical.

  • They apply equally to every member of the moral community (i.e., to all persons).
  • They do not depend on their consequences.
    • They do not depend on individual benefits.
    • The do not depend on social/collective benefits.

Moral Imperatives:
Hypothetical vs. Categorical

Now, all imperatives command either hypothetically, or categorically. The [hypothetical imperatives] represent the practical necessity of a possible action as a means to achieving something else that one wants (or that at least is possible for one to want).

   — Kant ([1786] 2011, IV 414)

The categorical imperative would be the one that represented an action as objectively necessary by itself, without reference to another end. . . .

    — Kant ([1786] 2011, IV 414)

. . . if the action would be good merely as a means to something else, the imperative is hypothetical; if the action is represented as good in itself, hence as necessary in a will that in itself conforms to reason, as its principle, then it is categorical.

    — Kant ([1786] 2011, IV 414)

Hypothetical Imperative
If you want to bring about \(X\), then do \(Y\).
Categorical Imperative
Do \(Y\)!

Deontological Ethics

  • Versions of natural law theory that uphold absolute prohibitions
  • W. D. Ross ethic of prima facie duties
  • Aristotle’s virtue ethics has a deontological dimension (virtuous agents seek virtue for its own sake)
  • Social contract theories
  • Right theories
  • Kantian ethics

Kantian Ethics

An Ethic of Respect

Kant’s ethics stands out for it’s emphasis on respect for “moral law,” that is, unconditionally binding moral obligations. At the heart of [Kant’s] analysis lay the idea that morally virtuous agents act out of respect for the moral law, and not simply in pursuit of their own interests and desires. In other words, virtuous agents respond to obligations as obligations.

   — Rehg (2017, sec. 4.1)

Moral Autonomy

Moral Autonomy
The will is self-ruling—that is, acting out of respect for the moral law.
Moral Heteronomy
The will is ruled by something outside of itself—for example, fear of punishment or hope of reward.

The Categorical Imperative (CI)

Version 1: Universal Law Formula

Act only according to that maxim through which you can at the same time will that it become a universal law.

. . .

So act as if the maxim of your action were to become by your will a UNIVERSAL LAW OF NATURE.

    — Kant ([1786] 2011, IV 421)

CI Version 1 and Contradictions

Imagine a general system of action in which everyone follows my maxim—that is, my plan of action—without exception.

  1. Contradictions in the very conception of the system generate perfect duties.
  2. Contradictions between the system of action and the basic conditions of rational agency generate imperfect duties.

Perfect and Imperfect Duties

  • Perfect duties
    • absolute prohibitions or obligations
    • most often negative duties (don’t do \(X\))
  • Imperfect (or meritorious) duties
    • context sensitive prohibitions or obligations
    • most often positive duties (do \(X\))

Issues for CI

  • Finding the right level of generalization
  • To high a bar (my action is permissible only if everyone could do the same thing without generating a contradiction in the system of action or between the system and my will)
  • Biases: cultural and unconscious

Version 2: Principle of Humanity

So act that you use humanity, in your own person as well as in the person of any other, always at the same time as an end, never merely as a means.

    — Kant ([1786] 2011, IV 429)

Version 2: Principle of Humanity

  • Does not require universalization
  • Emphasizes human dignity (human being are ends in themselves)
  • Mutual respect leads to a self-governing kingdom of ends

Connection between CI V1 and V2

Kant believed the first and second versions to be different ways of expressing the same Categorical Imperative. For present purposes, we may think of their relationship this way:

Connection between CI V1 and V2

When I act out of respect for universal moral law (the first formula), I act in a way that any rational agent can freely accept in good conscience. Thus others can, in principle, autonomously consent to my action. But if I act in ways to which they can consent, then I respect them as ends.

    — Rehg (2017, sec. 4.1.2)

Version 3: Kingdom of Ends

Morality thus consists in referring all action to the legislation by which alone a kingdom of ends is possible. This legislation must, however, be found in every rational being itself, and be able to arise from its will, the principle of which is thus:

Version 3: Kingdom of Ends

to do no action on a maxim other than in such a way, that it would be consistent with it that it be a universal law, and thus only in such a way that the will could through its maxim consider itself as at the same time universally legislating [for a kingdom of ends].

    — Kant ([1786] 2011, IV 434)

Version 3: Kingdom of Ends (Rehg)

Act only according to those policies that all rational beings could agree to as legislators making laws for a kingdom of ends.

    — Rehg (2017, sec. 4.1.2)

Kant on Publicity (CI V4?)

All actions that affect the rights of others are unlawful unless their maxims are suitable for publication.

    — Kant (1927, app. 2)

Beyond Kant

Scanlon

An act is wrong if its performance under the circumstances would be disallowed by any set of principles for the general regulation of behavior that no one could reasonably reject as a basis for informed, uncoerced, general agreement.

    — Scanlon (1998, 153)

Greater Burden Standard

It would be unreasonable to reject a principle because it imposed a burden on you when every alternative principle would impose much greater burdens on others [at least one person].

    — Gordon-Solmon (2019, 159)

Habermas’s Principle of Moral Universalization (U)

a moral norm is valid when the foreseeable consequences and side-effects of its general observance for the interests and value-orientations of each individual could be jointly accepted by all concerned without coercion in a rational discourse

    — Habermas (1998, 42)

Rehg’s Principle of Moral Regard

One may act only in ways that show due moral regard for human beings as members of society, that is: respect for the agency of human beings as autonomous, and concern for the needs of dependent human beings.

    — Rehg (2017, sec. 4.4)

Sources

Gordon-Solmon, Kerah. 2019. “Should Contractualists Decompose?” Philosophy & Public Affairs 47 (3): 259–87. https://doi.org/10.1111/papa.12146.
Habermas, Jürgen. 1998. The Inclusion of the Other. Edited by C. P. Cronin and P. DeGreiff. Cambridge, MA: MIT Press.
Kant, Immanuel. 1927. Perpetual Peace: A Philosophical Proposal. Translated by Helen O’Brien. London: Sweet and Maxwell.
———. (1786) 2011. Groundwork of the Metaphysics of Morals. Edited and translated by Jens Timmermann and Mary Gregor. Cambridge: Cambridge University Press.
Rehg, William. 2017. Cogent Cyberethics. Unpublished manuscript.
Scanlon, Thomas. 1998. What We Owe to Each Other. Cambridge, Mass: Belknap Press of Harvard University Press.