Revolutionary socialist in the context of "Friedrich Engels"

Karl Marx (German: [ˈkaʁl ˈmaʁks]; 5 May 1818 – 14 March 1883) was a German philosopher, political theorist, economist, journalist, and revolutionary socialist. He is best-known for the 1848 pamphlet The Communist Manifesto (written with Friedrich Engels), and his three-volume Das Kapital (1867–1894), a critique of classical political economy which employs his theory of historical materialism in an analysis of capitalism, in the culmination of his life's work. Marx's ideas and their subsequent development, collectively known as Marxism, have had enormous influence.

Born in Trier in the Kingdom of Prussia, Marx studied at the University of Bonn and the University of Berlin, and received a doctoral degree in philosophy from the University of Jena in 1841. A Young Hegelian, he was influenced by the philosophy of Georg Wilhelm Friedrich Hegel, and both critiqued and developed Hegel's ideas in works such as The German Ideology (written 1846) and the Grundrisse (written 1857–1858). While in Paris, Marx wrote his Economic and Philosophic Manuscripts of 1844 and met Engels, who became his closest friend and collaborator. After moving to Brussels in 1845, they were active in the Communist League, and in 1848 they wrote The Communist Manifesto, which expresses Marx's ideas and lays out a programme for revolution. Marx was expelled from Belgium and Germany, and in 1849 moved to London, where he wrote The Eighteenth Brumaire of Louis Bonaparte (1852) and Das Kapital. From 1864, Marx was involved in the International Workingmen's Association (First International), in which he fought the influence of anarchists led by Mikhail Bakunin. In his Critique of the Gotha Programme (1875), Marx wrote on revolution, the state and the transition to communism. He died stateless in 1883 and was buried in Highgate Cemetery.

Mikhail Alexandrovich Bakunin (30 May [O.S. 18 May] 1814 – 1 July 1876) was a Russian revolutionary anarchist. He is among the most influential figures of anarchism and a major figure in the revolutionary socialist, social anarchist, and collectivist anarchist traditions. Bakunin's prestige as a revolutionary also made him one of the most famous ideologues in Europe, gaining substantial influence among radicals throughout Russia and Europe.

Bakunin grew up in Pryamukhino, a family estate in Tver Governorate. From 1840, he studied in Moscow, then in Berlin, hoping to enter academia. Later in Paris, he met Karl Marx and Pierre-Joseph Proudhon, who deeply influenced him. Bakunin's increasing radicalism ended hopes of a professorial career. He was expelled from France for opposing the Russian Empire's occupation of Poland. After participating in the 1848 Prague and 1849 Dresden uprisings, Bakunin was imprisoned, tried, sentenced to death, and extradited multiple times. Finally, exiled to Siberia in 1857, he escaped via Japan to the United States and then to London, where he worked with Alexander Herzen on the journal Kolokol (The Bell). In 1863, Bakunin left to join the insurrection in Poland, but he failed to reach it and instead spent time in Switzerland and Italy.

Vladimir Ilyich Ulyanov (22 April [O.S. 10 April] 1870 – 21 January 1924), better known as Vladimir Lenin, was a Russian revolutionary, politician and political theorist. He was the first head of government of Soviet Russia from 1917 until his death in 1924, and of the Soviet Union from 1922 until his death. As the founder of the Bolsheviks, Lenin led the October Revolution, which established the world's first communist state. His government won the Russian Civil War and created a one-party state under the Communist Party. Ideologically a Marxist, his developments to the ideology are called Leninism.

Lenin embraced revolutionary socialist politics after his brother was executed in 1887 for plotting to assassinate the Russian tsar. He was expelled from Kazan Imperial University for participating in student protests, and earned a law degree before moving to Saint Petersburg in 1893 and becoming a prominent Marxist activist. In 1897, Lenin was exiled to Siberia for three years, after which he moved to Western Europe and became a leading figure in the Russian Social Democratic Labour Party. In 1903, the party split between Lenin's Bolshevik faction and the Mensheviks, with Lenin advocating for a vanguard party to lead the proletariat in establishing socialism. Lenin briefly returned to Russia during the Revolution of 1905. During the First World War he campaigned for its transformation into a Europe-wide proletarian revolution. After the February Revolution of 1917 ousted Tsar Nicholas II, Lenin returned to Russia and played a leading role in the October Revolution.

Amadeo Bordiga (13 June 1889 – 25 July 1970) was an Italian Marxist theorist. A revolutionary socialist, Bordiga was the founder of the Communist Party of Italy (PCdI), a member of the Communist International (Comintern), and later a leading figure of the Internationalist Communist Party (PCInt). He was originally associated with the PCdI but was expelled in 1930 after being accused of Trotskyism. Bordiga is viewed as one of the most notable representatives of left communism in Europe.