Six high-ranking members of the Soviet politburo, including Joseph Stalin, sign an order for the execution of 25,700 Polish intelligentsia, including 14,700 Polish POWs, in what will become known as the Katyn massacre.

The Political Bureau of the Central Committee of the Communist Party of the Soviet Union, abbreviated as Politburo, was the de facto highest executive authority in the Communist Party of the Soviet Union (CPSU). While elected by and formally accountable to the Central Committee, in practice the Politburo operated as the ruling body of Soviet Russia and the Soviet Union from its creation in 1919 until the party's dissolution in 1991. Full members and candidate (non-voting) members held among the most powerful positions in the Soviet hierarchy, often overlapping with top state roles. Its duties, typically carried out at weekly meetings, included formulating state policy, issuing directives, and ratifying appointments.

Joseph Vissarionovich Stalin was a Soviet politician and revolutionary who led the Soviet Union from 1924 until his death in 1953. He held office as General Secretary of the Communist Party from 1922 to 1952 and as the fourth premier from 1941 until his death. Despite initially governing the country as part of a collective leadership, he ultimately consolidated power to become an absolute dictator by the 1930s. Stalin codified the party's official interpretation of Marxism as Marxism–Leninism, while the totalitarian political system he created is known as Stalinism.

The intelligentsia is a status class composed of the university-educated people of a society who engage in the complex mental labours by which they critique, shape, and lead in the politics, policies, and culture of their society; as such, the intelligentsia consists of scholars, academics, teachers, journalists, and literary writers. Conceptually, the intelligentsia status class arose in the late 18th century, during the Partitions of Poland (1772–1795). Etymologically, the 19th-century Polish intellectual Bronisław Trentowski coined the term inteligencja (intellectuals) to identify and describe the university-educated and professionally active social stratum of the patriotic bourgeoisie; men and women whose intellectualism would provide moral and political leadership to Poland in opposing the cultural hegemony of the Russian Empire.