2. Material Success. Many people measure their self-worth based on how much money they make or what kind of car they drive or whether their front lawn is greener and prettier than the next-door neighbor’s. Research shows that once one is able to provide for basic physical needs (food, shelter, and so on), the correlation between happiness and worldly success quickly approaches zero. So if you’re starving and living on the street in the middle of India, an extra ten thousand dollars a year would affect your happiness a lot. But if you’re sitting pretty in the middle class in a developed
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