"[F]earful societies—and American society obviously isn’t the only example—develop markets for fear abatement. The most effective way for political entrepreneurs to tap into such markets is to focus on what or, better, who to blame for what makes people afraid. The simpler the depiction of fear’s source the better for the would-be political hustler. No matter how varied and interactively complex the real sources of fear and insecurity may be, rattled people are easily manipulated by demagogues offering parsimonious, emotion-driven conflations—say, about “carnage” caused by immigrants."