Aristotle: Nicomachean Ethics
What is the ultimate good, for Aristotle?
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The ultimate good for Aristotle is eudaimonia, which is usually translated as “happiness” or “flourishing”. The question then becomes about how to discern what makes human beings happy, since he has already said that the goal or purpose of human beings is the object of the science of politics/ethics.
Aristotle, Nichomachean Ethics, Book I