Ethics and Values / Unit 2 Ethics 080 short lesson, about 20 seconds
The Natural-Law Theory
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The idea
The Natural-Law Theory holds that right conduct accords with human nature's built-in purposes, which reason can read from the world.
In practice
Aquinas's line: the eye is for seeing, speech is for truth — so deception misuses speech. Purposes built into nature set the moral standard.
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