Hope is an emotion that has been implicated in social change efforts, yet little research has examined whether feeling hopeful actually motivates support for social change. Study 1 (N=274) confirmed that hope is associated with greater support for social change in two countries with different political contexts. Study 2 (N=165) revealed that hope predicts support for social change over and above other emotions often investigated in collective action research. Study 3 (N=100) replicated this finding using a hope scale and showed the effect occurs independent of positive mood. Study 4 (N=58) demonstrated experimentally that hope motivates support for social change. In all four studies, the effect of hope was mediated by perceived efficacy to ...