The 4 States With the Most Psychopaths Might Surprise You

If you’ve ever suspected that where you live might be shaping your personality, science is now backing you up — in a way that’s both fascinating and deeply unsettling. 

According to a massive new study led by researchers at the University of Copenhagen, certain places in the U.S. are more likely to produce people with what psychologists call "dark" personality traits. Four states top the list.

The study analyzed data from more than 2 million people across 183 countries and all 50 U.S....