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Moral rationalism

Overview

Moral rationalism, also called ethical rationalism, is a view in meta-ethics (specifically the epistemology of ethics) according to which moral principles are knowable a priori, by reason alone. Some prominent figures in the history of philosophy who have defended moral rationalism are Plato and Immanuel Kant. Perhaps the most prominent figure in the history of philosophy who has rejected moral rationalism is David Hume. Recent philosophers who have defended moral rationalism include Richard Hare, Christine Korsgaard, Alan Gewirth, and Michael Smith.

Moral rationalism is similar to the rationalist version of ethical intuitionism; however, they are distinct views. Moral rationalism is neutral on whether basic moral beliefs are known via inference or not. A moral rationalist who believes that some moral beliefs are justified non-inferentially is a rationalist ethical intuitionist. So, rationalist ethical intuitionism implies moral rationalism, but the reverse does not hold.

Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).

Possible passages

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  1. But all philosophy is either cognition on the basis of pure reason, or the cognition of reason on the basis of empirical principles. The former is termed pure, the latter empirical philosophy. The philosophy of pure reason is either propædeutic, that is, an inquiry into the powers of reason in regard to pure à priori cognition, and is termed critical philosophy; or it is, secondly, the system of pure reason—a…

    Immanuel Kant, The Critique of Pure Reason

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  2. This is either the self-love that consists in an excessive fondness for oneself (philautia), or satisfaction with oneself (arrogantia). The former is called particularly selfishness; the latter self-conceit. Pure practical reason only checks selfishness, looking on it as natural and active in us even prior to the moral law, so far as to limit it to the condition of agreement with this law, and then it is called…

    Immanuel Kant, The Critique of Practical Reason

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  3. 2. The other species of philosophers consider man in the light of a reasonable rather than an active being, and endeavour to form his understanding more than cultivate his manners. They regard human nature as a subject of speculation; and with a narrow scrutiny examine it, in order to find those principles, which regulate our understanding, excite our sentiments, and make us approve or blame any…

    David Hume, An Enquiry Concerning Human Understanding

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Related ideas

Place in the tradition

Part of Metaethics.

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