The historical concept, frequently encountered in Advanced Placement United States History curricula, centers on an argument about the significance of the American frontier. It posits that the frontier experience fundamentally shaped American character and institutions by fostering individualism, democracy, and a spirit of innovation. For example, westward expansion necessitated self-reliance and adaptability, qualities that were then believed to be core to the national identity.
The importance of this interpretation lies in its influence on understanding American exceptionalism and the development of key traits attributed to the nation. While celebrated for emphasizing democratic values and the pioneer spirit, it has also been critiqued for overlooking the negative impacts of westward expansion on Native American populations and the environment. Its historical context places it within the late 19th century, a period of intense industrialization and westward movement, where the perceived closing of the frontier spurred reflection on its role in shaping the nation’s past and future.