20 Reasons Why You Don't Like Certain People

In one of the articles in Harvard Magazine, social psychologist Amy Cuddy explains: “If you think someone’s a jerk, you’ll behave toward them in a way that elicits jerky behaviors,” says Cuddy. “And then you say, ‘See? He is a jerk!’ This is one of the dangers of stereotypes. When we elicit behaviors consistent with the stereotypes we hold, we tell ourselves, ’See? The stereotypes are right!’”