deontologie

Deontologie, or deontology, is a branch of normative ethics that evaluates the morality of actions according to duties, rules, or obligations rather than by their consequences. Rooted in the idea that rational agents have duties that bind them, deontological theories hold that some actions are morally required, forbidden, or permissible independently of outcomes. The central concern is moral law or duty formulated in universalizable terms.

In Kantian ethics, the category of duty is grounded in the categorical imperative, which asks whether a maxim could be willed as a universal law. A related principle is that people should be treated as ends in themselves and never merely as means. This emphasis on rational consistency, autonomy, and respect for persons is characteristic of many deontological approaches.

Two influential strands are distinguished within deontology: act deontology, which assesses each action by its own adherence to duty, and rule deontology, which emphasizes adherence to general rules. W. D. Ross proposed prima facie duties—duties that are binding unless outweighed by stronger duties in a given context.

Deontological ethics inform professional codes and public policy, including medical ethics (privacy, informed consent), journalism, and legal professions, where duties to truth, justice, and clients or patients are framed as binding obligations.

Critics argue that strict allegiance to duties can be inflexible in cases where duties conflict or where consequences would be beneficial. Proponents contend that deontology provides clear, intelligible constraints on actions and respects the intrinsic value of persons. In French, déontologie is used similarly to denote the ethics of obligation, and the term appears in professional ethics contexts.