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Battling Our Brains: Psychology, Happiness, and Global Warming

Why are some societies rich and others poor? On this subject, Nobel Laureate Robert Lucas wrote, "The consequences for human welfare involved in questions like these are simply staggering: once one starts to think about them, it is hard to think about anything else." The topic is a fascinating one, no doubt, and legions of social scientists have devoted careers to it. But it is quite secondary to a far more fundamental question: Why are some people happy and others not?