According to author Thomas C. Corley, successful people tend to associate more with like-minded optimists. Photo: Dan Kitwood/Getty

Avoid pessimists, they'll drag you down, says 5-year study of rich people

You are only as successful as those you hang out with, and positivity is a hallmark of the rich, author says in new book

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According to author Thomas C. Corley, successful people tend to associate more with like-minded optimists. Photo: Dan Kitwood/Getty
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