Conspiracy theories abound in social and political discourse, believed by millions of people around the world. In this article, we highlight when it is important to engage with people who believe in conspiracy theories and review recent literature highlighting how best to do so. We first summarise research on the potentially damaging consequences of conspiracy beliefs for individuals, including consequences related to psychopathology. We also focus on the consequences for groups, and societies, and the importance of understanding and addressing conspiracy (...) beliefs. We then review recent literature on how to engage with people who believe in conspiracy theories, specifically with the goal to reduce susceptibility to conspiracy theories and other types of misinformation. We focus on interpersonal strategies to communicate with individuals who believe in conspiracy theories, and large-scale strategies designed to reduce conspiracy beliefs within broader communities. (shrink)