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Categorical Imperative - A categorical imperative, by contrast, is an absolute command, such as "you shall treat people with respect," which is not based on subjective considerations. Thus, the supreme principle of morality is a categorical imperative since it is not conditional upon one's preferences. (categorical / hypothetical imperative) In the moral philosophy of Kant, a distinction between ways in which the will may be obliged. A hypothetical imperative (of the form, "If you want X, then do A.") is always conditioned on something else, but a categorical imperative (of the form "Do A.") is absolute and universal. Moral action for Kant always follows from the categorical imperative, "Act only according to that maxim whereby you can at the same time will that it become a universal law." 18th century German philosopher Immanuel Kant (1724-1804) presents a criterion of moral obligation, which he calls the categorical imperative. Kant's account of morality fits squarely into the deontological tradition and is found in three principal books: The Foundations of the Metaphysics of Morals (1785), The Critique of Practical Reason (1788), and The Metaphysics of Morals (1798). Kant's writings indicate that he was aware of the moral traditions that went before him, such as virtue theory which bases morality on good character traits, and consequentialist accounts which base morality solely on the consequences of actions. In all of his ethical writings, Kant rejects these traditional theories of morality and argues instead that moral actions are based on a "supreme principle of morality" which is objective, rational, and freely chosen: the categorical imperative. Kant's clearest account of the categorical imperative is in the Foundations of the Metaphysics of Morals. In Section one of the Foundations, Kant argues against traditional criteria of morality, and explains why the categorical imperative can be the only possible standard of moral obligation. He begins with a general account of willful decisions. The function of the human will is to select one course of action from among several possible courses of action (for example, my choice to watch television right now instead of going jogging). Our specific willful decisions are influenced by several factors, such as laziness, immediate emotional gratification, or what is best in the long run. Kant argues that in moral matters the will is ideally influenced only by rational considerations, and not by subjective considerations such as one's emotions. This is because morality involves what is necessary for us to do (e.g., you must be benevolent), and only rational considerations can produce necessity. The rational consideration which influences the will must be a single principle of obligation, for only principles can be purely rational considerations. Also, the principle must be a command (or imperative) since morality involves a command for us to perform a particular action. Finally, the principle cannot be one that appeals to the consequences of an action, such as the joy I would receive from watching television; for, appeals to consequences involve emotional considerations. The only principle which fulfills these requirements is the categorical imperative which dictates the universalizability of our actions: "act only on that maxim by which you can at the same time will that it should become a universal law." Morality, then, consists of choosing only those actions that conform to the categorical imperative. In Section two, Kant explains key terms, presents different formulations of the categorical imperative, and illustrates the categorical imperative with examples of specific immoral acts. He begins by distinguishing between types of imperatives. Imperatives in general are commands that dictate a particular course of action, such as "you shall clean your room." Hypothetical imperatives are commands that depend on my preference for a particular end, and are stated in conditional form, such as, "If I want to lose weight, then I should eat less." In this case, the command to eat less hinges on my previous preference to lose weight. There are two types of hypothetical imperatives. Problematic-hypothetical imperatives involve rules of skill based on preferences that vary from person to person (such as "If you want to be a doctor then you should go to medical school"). Assertoric-hypothetical imperatives, by contrast, involve rules of prudence based on the preference everyone has to be happy (such as, "If you want to be happy, then you should go skydiving"). None of these hypothetical imperatives, however, are moral imperatives, since the command is based on subjective considerations that are not absolute. A categorical imperative, by contrast, is an absolute command, such as "you shall treat people with respect," which is not based on subjective considerations. Thus, the supreme principle of morality is a categorical imperative since it is not conditional upon one's preferences.