Nikolai Bukharin in the context of "Joseph Stalin's rise to power"

Bolshevism (derived from Bolshevik) is a revolutionary socialist current of Soviet Leninist and later Marxist–Leninist political thought and political regime associated with the formation of a rigidly centralized, cohesive and disciplined party of social revolution, focused on overthrowing the existing capitalist state system, seizing power and establishing the "dictatorship of the proletariat".

Bolshevism originated at the beginning of the 20th century in Russia and was associated with the activities of the Bolshevik faction within the Russian Social Democratic Labour Party led by Vladimir Lenin, Bolshevism's main theorist. Other theoreticians included Joseph Stalin, Leon Trotsky, Nikolai Bukharin and Yevgeni Preobrazhensky. While Bolshevism was based on Marxist philosophy, it also absorbed elements of the ideology and practice of the socialist revolutionaries of the second half of the 19th century (Sergey Nechaev, Pyotr Tkachev, Nikolay Chernyshevsky) and was influenced by Russian agrarian socialist movements like the Narodniks.

The Right Opposition (Russian: Правая оппозиция, romanized: Pravaya oppozitsiya) or Right Tendency (Правый уклон, Praviy uklon) in the All-Union Communist Party (Bolsheviks) was a label formulated by Joseph Stalin in Autumn of 1928 for the opposition against certain measures included within the first five-year plan, an opposition which was led by Nikolai Bukharin, Alexei Rykov, Mikhail Tomsky, and their supporters within the Soviet Union that did not follow the so-called "general line of the party". It is also the name given to "right-wing" critics within the Communist movement internationally, particularly those who coalesced in the International Communist Opposition, regardless of whether they identified with Bukharin and Rykov.

The Moscow trials were a series of show trials held by the Soviet Union between 1936 and 1938 at the instigation of Joseph Stalin. They were nominally directed against "Trotskyists" and members of the "Right Opposition" of the Communist Party of the Soviet Union.

1. The "Case of the Trotskyite–Zinovievite Terrorist Center" (or Zinoviev–Kamenev Trial, also known as the 'Trial of the Sixteen', August 1936);
2. The "Case of the Anti-Soviet Trotskyist Center" (or Pyatakov–Radek Trial, also known as the 'Trial of the Seventeen', January 1937); and
3. The "Case of the Anti-Soviet 'Bloc of Rightists and Trotskyites'" (or the Bukharin–Rykov Trial, also known as the 'Trial of the Twenty-One', March 1938).

The defendants were Old Bolshevik Party leaders and top officials of the Soviet secret police. Most were charged under Article 58 of the RSFSR Penal Code with conspiring with imperialist powers to assassinate Stalin and other Soviet leaders, dismember the Soviet Union, and restore capitalism. Several prominent figures (such as Andrei Bubnov, Alexander Beloborodov, Nikolai Yezhov) were sentenced to death during the Stalin era outside these trials.

Alexei Maximovich Peshkov (Russian: Алексей Максимович Пешков; 28 March [O.S. 16 March] 1868 – 18 June 1936), popularly known as Maxim Gorky (/ˈɡɔːrki/; Максим Горький), was a Russian and Soviet writer and proponent of socialism. He was nominated five times for the Nobel Prize in Literature. Before his success as an author, he travelled widely across the Russian Empire, changing jobs frequently; these experiences would later influence his writing. He associated with fellow Russian writers Leo Tolstoy and Anton Chekhov, both mentioned by Gorky in his memoirs.

Gorky was active in the emerging Marxist socialist movement and later supported the Bolsheviks. He publicly opposed the Tsarist regime and for a time closely associated himself with Vladimir Lenin and Alexander Bogdanov's Bolshevik wing of the Russian Social Democratic Labour Party. During World War I, Gorky supported pacifism and internationalism and anti-war protests. For a significant part of his life, he was exiled from Russia and later the Soviet Union, being critical both of Tsarism and of the Bolsheviks during the Russian Civil War and the 1920s, condemning the latter for political repressions. In 1928 he returned to the USSR on Joseph Stalin's personal invitation and lived there from 1932 until his death in June 1936. After his return he was officially declared the "founder of Socialist Realism". Despite this, Gorky's relations with the Soviet regime were rather difficult: while being Stalin's public supporter, he maintained friendships with Lev Kamenev and Nikolai Bukharin, the leaders of the anti-Stalin opposition executed after Gorky's death; he also hoped to ease the Soviet cultural policies and made some efforts to defend the writers who disobeyed them, which resulted in him spending his last days under unannounced house arrest.

The 2nd World Congress of the Communist International was a gathering of approximately 220 voting and non-voting representatives of communist and revolutionary socialist political parties from around the world, held in Petrograd and Moscow from July 19 to August 7, 1920. The 2nd Congress is best remembered for formulating and implementing the 21 Conditions for membership in the Communist International.

The Case of the Anti-Soviet "Bloc of Rightists and Trotskyites" (or "Bloc of Rights and Trotskyites"; Russian: Процесс антисоветского «право-троцкистского блока»), also known as the Trial of the Twenty-One, was the last of the three public Moscow trials charging prominent Bolsheviks with espionage and treason. The Trial of the Twenty-One took place in Moscow in March 1938, towards the end of the Soviet Great Purge. The accused were tortured to extract confessions and publicly admitted their guilt during the show trial. Most of the accused, including Nikolai Bukharin, Alexei Rykov and Genrikh Yagoda, were convicted, and sentenced to death. All charges are considered fabricated except the against NKVD chief Genrikh Yagoda of poisoning Valerian Kuybyshev, Vyacheslav Menzhinsky, and Maxim Gorky; Yagoda might indeed have conducted the poisoning with the assistance of "Kremlin's doctors" Pletnyov and Lev Levin, but they did it on the orders from Stalin himself.