The Covid-19 pandemic has highlighted the importance of scientific expertise in crafting policy, and policymakers depend on expert advice in many other arenas, including climate policy, regulation, and economic policy. However, recent polling demonstrates a deterioration and polarization of public trust in scientific experts. This course examines the politics of science and expertise. It covers theories and evidence about topics such as the motivations of experts, the roles of scientific communities, interactions between experts and policymakers, and public views of experts' credibility. Students will engage with both relevant social science research and with case studies of policy-relevant scientific work to draw connections to the theories considered in class.