How Immanuel Kant might approach Ethics

The question of ethics demands our most rigorous attention, for it concerns not merely the empirical inclinations of men, but the very foundation of rational agency. To inquire into ethics is to inquire into the conditions of possibility for a good will, a will which acts not from inclination or prudential calculation, but from duty itself. This duty is not an external imposition, but an internal necessity, derived from reason’s own structure.

We must, therefore, begin by separating what is merely contingent and empirical from what is necessary and a priori. The multitude of customs and desires that govern the actions of men in different societies or even within a single individual can offer no stable ground for moral law. Such considerations belong to the realm of the hypothetical imperative, commanding actions as means to some desired end. But true morality resides in the categorical imperative, which commands an action as objectively necessary in itself, without reference to any other end.

The supreme principle of morality, then, must be universal and necessary, applicable to all rational beings. Such a principle is found in the formula: "Act only according to that maxim whereby you can at the same time will that it should become a universal law." This maxim demands that we test the subjective principle of our action by asking whether we could rationally desire its universal adoption without contradiction. Furthermore, we must always treat humanity, in our own person and in the person of every other, never merely as a means to an end, but always at the same time as an end. For humanity, in its capacity for autonomy, possesses an intrinsic worth, a dignity that reason alone can apprehend. To violate this is to undermine the very foundation of rational existence and…

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