Why should belonging to a crowd improve your health? The psychologists think shared identity is the cause. "You think in terms of'we' rather than"l,'" explains Nick Hopkins, a colleague sce e of Reicher's from the University of Dundee in the U.K. This way of thinking alters human relationships. Members of the crowd support one another, competition becomes cooperation, and people are able to achieve their goals in a way they wouldn't be able to alone.