Romantic nationalism is the form of nationalism in which the state claims its political legitimacy as an organic consequence of the unity of those it governs. This includes such factors as language, race, ethnicity, culture, religion, and customs of the nation in its primal sense of those who were born within its culture. It can be applied to ethnic nationalism as well as civic nationalism. Romantic nationalism arose in reaction to dynastic or imperial hegemony, which assessed the legitimacy of the state from the top down, emanating from a monarch or other authority, which justified its existence. Such downward-radiating power might ultimately derive from a god or gods (see the divine right of kings and the Mandate of Heaven).

The revolutions of 1848, known in some countries as the springtime of the peoples or the springtime of nations, were a series of revolutions throughout Europe over the course of more than one year, from 1848 to 1849. It remains the most widespread revolutionary wave in European history to date.