American exceptionalism is the belief that the United States is either distinctive, unique, or exemplary compared to other nations. Proponents argue that the values, political system, and historical context of the United States are exceptional and worthy of universal admiration. The principles that are often collectively referred to as "American exceptionalism" include liberty, egalitarianism, individualism, republicanism, democracy, and laissez-faire economics.

Assertions of American exceptionalism are generally made on the basis of the country’s founding. Proponents of the concept argue that the United States was uniquely founded on republican ideals rather than centring on a historical community or ruling elite. The identification of the United States as a unique embodiment of liberty in a world overrun by oppression goes back to the American Revolution.

Critics of the notion of American exceptionalism argue that belief in the concept is unwarranted and seek to reveal the flaws in the United States political system and history. They argue that the United States is not morally superior to other nations and that the belief in American exceptionalism can lead to a lack of critical self-reflection and a reluctance to engage in international cooperation.

In summary, American exceptionalism is the belief that the United States is unique and superior to other nations, based on its values, political system, and historical context. While proponents argue that the United States is obligated to play a special role in global politics, critics argue that the belief in American exceptionalism can lead to a lack of critical self-reflection and a reluctance to engage in international cooperation.