Lenin in the context of "New Economic Policy"

The Second Congress of the Russian Social Democratic Labour Party was held from July 30 to August 23 (July 17 – August 10, O.S.) 1903, starting in Brussels, Belgium (until August 6) and ending in London, England. Probably as a result of diplomatic pressure from the Russian Embassy, Belgian police had forced the delegates to leave the country on August 6. The congress finalized the creation of the Marxist party in Russia proclaimed at the 1st Congress of the RSDLP. This congress brought the first split within the party, between the Bolshevik faction led by Lenin, and the Menshevik faction led by Martov.

Marxism–Leninism (Russian: марксизм-ленинизм, romanized: marksizm-leninizm) is a communist ideology that became the largest faction of the communist movement in the world in the years following the October Revolution. It was the predominant ideology of most communist governments throughout the 20th century. It was developed in the Union of Soviet Socialist Republics by Joseph Stalin and drew on elements of Bolshevism, Leninism, and Marxism. It was the state ideology of the Soviet Union, Soviet satellite states in the Eastern Bloc, and various countries in the Non-Aligned Movement and Third World during the Cold War, as well as the Communist International after Bolshevization.

Today, Marxism–Leninism is the de jure ideology of the ruling parties of China, Cuba, Laos, and Vietnam, as well as many other communist parties. The state ideology of North Korea is derived from Marxism–Leninism, although its evolution is disputed.

The Left Opposition (Russian: Левая оппозиция, romanized: Levaya oppozitsiya) was a faction within the Russian Communist Party (Bolsheviks) from 1923 to 1927 headed by Leon Trotsky, who formed it to mount a struggle against the perceived bureaucratic degeneration within the party leadership headed by Stalin after the death of the Bolshevik founder Lenin in 1924. The Left Opposition advocated for a programme of rapid industrialization, voluntary collectivisation of agriculture, and the expansion of a worker's democracy in a wider framework with the New Economic Policy.

Intellectuals who had previously lived in exile during the Tsarist era would constitute the core of the Left Opposition during the succession period. Members represented the most internationalist elements of the party and held offices at the highest responsibility with Christian Rakovsky, Adolph Joffe, and Nikolay Krestinsky holding ambassadorial posts in London, Paris, Tokyo, and Berlin.

Kazan Federal University (Russian: Казанский (Приволжский) федеральный университет; Tatar: Казан (Идел буе) федераль университеты, romanized: Qazan (İdel buyı) federal universitetı) is a public research university located in Kazan, Russia.

The university was founded in 1804 as Imperial Kazan University, which makes it the second oldest continuously existing tertiary education institution in Russia. Founder of non-Euclidean geometry Nikolai Ivanovich Lobachevsky served there as the rector from 1827 until 1846. In 1925, the university was renamed in honour of its student Vladimir Ilyich Ulyanov (Lenin). The university is known as the birthplace of organic chemistry due to works by Aleksandr Butlerov, Vladimir Markovnikov, Aleksandr Arbuzov, and the birthplace of electron spin resonance discovered by Evgeny Zavoisky.

The July Days (Russian: Июльские дни) were a period of unrest in Petrograd, Russia, between 16–20 July [O.S. 3–7 July] 1917. It was characterised by spontaneous armed demonstrations by soldiers, sailors, and industrial workers engaged against the Russian Provisional Government. The demonstrations were angrier and more violent than those during the February Revolution months earlier.

The Provisional Government blamed the Bolsheviks for the violence brought about by the July Days and in a subsequent crackdown on the Bolshevik Party, the party was dispersed, many of the leadership arrested. Vladimir Lenin fled to Finland, while Leon Trotsky was among those arrested.

World revolution is the Marxist concept of overthrowing capitalism in all countries through the conscious revolutionary action of the organized working class. For theorists, these revolutions will not necessarily occur simultaneously, but where and when local conditions allow a revolutionary party to successfully replace bourgeois ownership and rule, and install a workers' state based on social ownership of the means of production. In many Marxist schools, such as Trotskyism and communist left, the essentially international character of the class struggle and the necessity of global scope are critical elements and a chief explanation of the failure of socialism in one country.

The end goal of such internationally oriented revolutionary socialism is to achieve world socialism, and later, a communist society.

The Donetsk–Krivoy Rog Soviet Republic or Donetsk–Kryvyi Rih Soviet Republic (Russian: Донецко-Криворожская советская республика, romanized: Donetsko-Krivorozhskaya sovyetskaya respublika; Ukrainian: Донецько-Криворізька Радянська Республіка, romanized: Donetsko-Kryvorizka Radianska Respublika) was a self-declared Soviet republic of the Ukrainian People's Republic of Soviets proclaimed on 12 February 1918. It was founded three days after the government of the Ukrainian People's Republic (UPR) signed its Treaty of Brest-Litovsk with the Central Powers, which recognised the borders of the UPR. Lenin did not support the creation of the entity and neither did Sverdlov. Some other Bolsheviks like Elena Stasova, however, sent a telegraph of best wishes.

On 3 March 1918 a separate Treaty of Brest-Litovsk was signed between Soviet Russia and the Central Powers (Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria), by which Russia withdrew from World War I. The Article III of the treaty stated that "the territories lying to the west of the line agreed upon by the contracting parties which formerly belonged to Russia, will no longer be subject to Russian sovereignty" and "the future status of these territories will be determined in agreement with their population".