Creating Conflict Between Groups Psychologist Muzafer Sherif and his colleagues demonstrated how easily hostility and distrust could be created between two groups. Competitive situations, like this tug-of-war, increased tension between the Rattlers and the Eagles.

From Sherif, Muzafer; Harvey, O. J.; White, B. Jack; Hood, William R.; & Sherif, Carolyn W. (1961/1988). The Robbers Cave Experiment: Intergroup Conflict and Cooperation. Middletown, CT: Wesleyan University Press.