Daniel Kahneman's transformative insights on rationality and happiness

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Daniel Kahneman's transformative insights on rationality and happiness

In 350 BCE, Aristotle wrote a book about the soul — or, more accurately, different types of souls. For Aristotle, a soul is what turns a lifeless lump of flesh into a walking, talking, singing, fighting, crying, and laughing thing. It’s what animates the inanimate, but it’s also what gets you out of bed in the morning. A soulless person is listless. A soulful person is full of beans. A soul is what drives all living things to carry on. But not a…