Book excerpt: The Cambridge History of America and the World offers a transformative account of American engagement in the world from 1500 to the present. Representing a new scholarship informed by the transnational turn in the writing of US history and American foreign relations, the four-volume reference work gives sustained attention to key moments in US diplomacy, from the Revolutionary War and the Monroe Doctrine to the US rise as a world power in World War I, World War II and the Cold War. The volumes also cast a more inclusive scholarly net to include transnational histories of Native America, the Atlantic world, slavery, political economy, borderlands, empire, the family, gender and sexuality, race, technology, and the environment. Collectively, they offer essential starting points for readers coming to the field for the first time and serve as a critical vehicle for moving this scholarship forward in innovative new directions.