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Can psychological science offer evidence-based solutions to climate change? Using insights and principles derived from the literature on social dilemmas and human cooperation, we discuss evidence in support of three solutions: crossing the borders of thought, time, and space. First, borders of thought could be crossed by using persuasion that is concrete and tailored to local circumstances and by highlighting information about people’s efforts as evidence against the myth of self-interest. Second, borders of time could be crossed by using kinship cues, which can help make the future less distant, and relatively uninvolved advisors, who may help make the future salient. And third, borders of space could be crossed by showing group representatives how they might benefit from a frame of altruistic competition—focusing on the benefits of being seen as moral and global in orientation. Our overall conclusion is that …