There has been an error in the display of this page. There has been an error in the display of this the nav. There has been an error in the display of this page. Collective Behavior and Social Change: Key Terms The following terms are essential in order to complete the exercises in this unit. Click on the term to see its definition. alternative social movement crowd demography deprivation theory gossip mass behavior mass hysteria mass society mass-society theory material culture mob modernity modernization non-material culture panic progressive social movement propaganda public opinion reactionary social movement redemptive social movement reformative social movement relative deprivation resource-mobilization theory revolutionary movement riot rumor social change social movement There has been an error in the display of this page.