How did Joseph Stalin's government use terror in the Soviet Union?

Joseph Stalin’s government utilized state-sponsored terror as a fundamental instrument of control to consolidate personal power and enforce totalitarian rule. This system of persecution, often referred to as Stalinism, relied on several key mechanisms:2

• The Great Purge: Stalin launched campaigns of political terror, most notably in the late 1930s, to eliminate perceived rivals and "enemies of the state." This included show trials where veteran Bolsheviks, military leaders, and government officials were forced to provide fabricated confessions before being executed.123
• The Gulag System: The Gulag, a vast network of forced-labor camps, served as a primary tool for repression. Millions of people—including peasants resisting collectivization, purged party members, and innocent citizens—were imprisoned under brutal conditions, often facing starvation or summary execution.42
• Security Apparatus: Agencies such as the NKVD and MGB acted as the regime's enforcers. They managed a massive network of informers, conducted mass arrests, and oversaw the deportation of entire ethnic groups suspected of disloyalty.43

Stalin’s policies resulted in the deaths of millions through executions, forced labor, and state-induced famine. The use of such violence against one's own population is a profound violation of fundamental human rights and ethical governance.2