This chapter examines the historical foundations of grand strategy, tracing its origins and evolution. Furthermore, it investigates the differences between strategy and grand strategy and later examines how grand strategy differs from foreign policy by emphasizing its broader scope and long-term perspective. Moreover, this chapter delves into the rich literature surrounding grand strategy, highlighting key theorists and their contributions to the field. Going into more details, by examining various types of grand strategy, the chapter elucidates the differences and nuances among them, providing a comprehensive framework for understanding the concept. Lastly, this chapter analyzes the pivotal role of grand strategy in shaping U.S. foreign policy from the nation's founding until the Clinton era, offering historical examples to illustrate its significance and impact on American diplomacy.