This is a selection of writings by Russian revolutionary leader V.I. Lenin on internationalism, fighting national oppression, and the need for a voluntary union of soviet socialist republics. In recent posts, World-Outlook has referred to the fight Lenin carried out at the end of his life for a genuinely internationalist approach to ensuring such a voluntary union in the early years after the Russian Revolution of 1917. Russia’s brutal invasion of Ukraine this year, and Vladimir Putin’s distortions of Russia’s and Ukraine’s revolutionary history, give renewed importance to these issues.