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The psychologists tell us that 3 or 4 percent of the population are sociopaths.
Luckily or unluckily, what are called the "professions" (doctors, lawyers, judges, politicians, economists, corporate "leaders", military officers, etc.) seem to sop up most of them, so it is quite possible to lead a pleasant life (most of the time) without being polluted by their shadows falling on one.
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