We demand freedom of self-determination, i.e., independence, i.e., freedom of secession for the oppressed nations, not because we have dreamt of splitting up the country economically, or of the ideal of small states, but, on the contrary, because we want large states and the closer unity and even fusion of nations, only on a truly democratic, truly internationalist basis, which is inconceivable without the freedom to secede.

Vladimir Lenin, The Revolutionary Proletariat and the Right of Nations to Self-Determination (circa 1915)