Scholars frequently place the beginning of nationalism in the late 18th century or early 19th century with the American Declaration of Independence or with the French Revolution. The consensus is that nationalism as a concept was firmly established by the 19th century. In histories of nationalism, the French Revolution (1789) is seen as an important starting point, not only for its impact on French nationalism but even more for its impact on Germans and Italians and on European intellectuals. The template of nationalism, as a method for mobilising public opinion around a new state based on popular sovereignty, went back further than 1789: philosophers such as Rousseau and Voltaire, whose ideas influenced the French Revolution, had themselves been influenced or encouraged by the example of earlier constitutionalist liberation movements, notably the Corsican Republic (1755–1768) and American Revolution (1775–1783).