Principal Elements of Kant's Moral Rules

  1. Rational consistency:
    1. Is the rule universalizable? Can everyone follow it?
    2. Is the rule self-defeating? Can one will that all follow it?
    3. Does the rule contradict other maxims that have already passed the Categorical Imperative Test?

  2. Respect for persons:
    1. Does the rule undermine personal autonomy?
    2. Does the rule contravene the fundamental equal intrinsic of worth of all persons?
    3. Does the rule compromise human rationality?

If the proposed rule passes these tests, then Kant says it can be a proper Moral Rule, one which commands all rational beings. But this only makes the rule morally correct ...

Two formulations of the Categorical Imperative

  1. "Act only on that maxim through which you can at the same time will that it should become a universal law."

  2. "Act in such a way that you always treat humanity, whether in your own person or in the person of any other, never simply as a means, but always at the same time as an end."

Kantian deontology is concerned with respect for persons: every person has an inherent dignity both towards himself and others. The duties that follow from this are, Kant argues, of two kinds: perfect duties that allow for no exceptions and imperfect duties that can be realized in any number of ways which allow for exceptions and prioritizing but never take precedence over perfect duties.

4-fold Classification of Kantian Duties

Kantian Perfect Duties

  • Perfect duties require that we either do or abstain from certain acts, with no exceptions.
  • Perfect duties are universally binding on all rational persons, for they are necessary in order to respect the inherent worth of persons.
  • Treating someone just as a means to an end violates the perfect duty we all have to respect each others' humanity and autonomy.
  • People are ends in themselves and failing to treat them as such is failing to give them the respect they are due.
  • We can use people as a means with informed consent sometimes but we must not use them merely as a means.

    Kantian Imperfect Duties