Book excerpt: Climate change, nuclear proliferation, and the threat of a global pandemic have the potential to impact each of our lives. Preventing these threats poses a serious global challenge, but ignoring them could have disastrous consequences. How do we engineer institutions to change incentives so that these global public goods are provided? Scott Barrett provides a thought provoking and accessible introduction to the issues surrounding the provision of global public goods. Using a variety of examples to illustrate past successes and failures, he shows how international cooperation, institutional design, and the clever use of incentives can work together to ensure the effective delivery of global public goods.