chess_loves

A gentleman who plays chess at a local cafe told me that studying chess helps one to think more clearly, and thus be more effective in "real-world" endeavors. Woe is me! I am a mediocre chess player, with only slow improvement. 

I consoled myself because I read that Napoleon was a poor chess player, yet a brilliant general. What do people think: Is there a correlation between good chess playing and being effective in the world?