This book is focused on explaining the grand strategic behavior of the United States from the Founding of the Republic to the Trump administration. To do so it employs a neoclassical realist framework to argue that while systemic change explains the broad evolution of US grand strategy, the precise shape and content of the grand strategies pursued has been conditioned by domestic political culture and interests. The book argues that distinct political cultures of statecraft (Hamiltonian, Jeffersonian, Jacksonian and Wilsonian) have acted as permissive filters through which policy-makers have interpreted and responded to systemic stimuli making some grand strategy choices more likely than others in the pursuit of national security. The book demonstrates that while primacist grand strategies were facilitated by the predominance from the mid-19 th  century to the early 21 st  century of the vindicationist Hamiltonian and Wilsonian forms of statecraft, the costs of primacy have now stimulated the resurgence of the long dormant, exemplarist Jeffersonian and Jacksonian forms of statecraft under the Obama and Trump administrations, resulting in grand strategies that seek to either manage or stave off decline in America's relative power position.