- published: 12 Nov 2014
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Deontological ethics or deontology (from Greek deon, "obligation, duty"; and -logia) is the normative ethical position that judges the morality of an action based on the action's adherence to a rule or rules. It is sometimes described as "duty" or "obligation" or "rule" -based ethics, because rules "bind you to your duty". Deontological ethics is commonly contrasted to consequentialism. Deontological ethics is also contrasted to pragmatic ethics.
There are numerous formulations of deontological ethics.
Contemporary deontologists include Thomas Nagel, Thomas Scanlon, Roger Scruton and Frances Kamm.
Frances Kamm's "Principle of Permissible Harm" is an effort to derive a deontological constraint which coheres with our considered case judgments while also relying heavily on Kant's Categorical Imperative. The Principle states that one may harm in order to save more if and only if the harm is an effect or an aspect of the greater good itself. This principle is meant to address what Kamm feels are most people's considered case judgements, many of which involve deontological intuitions. For instance, Kamm argues that we believe it would be impermissible to kill one person to harvest his organs in order to save the lives of five others. Yet, we think it is morally permissible to divert a runaway trolley that would otherwise kill five innocent and immobile people onto a side track where one innocent and immobile person will be killed. Kamm believes the Principle of Permissible Harm explains the moral difference between these and other cases, and more importantly expresses a constraint telling us exactly when we may not act to bring about good ends—such as in the organ harvesting case.