Why did the Soviet Union break up

The main reason for the dissolution of the Soviet Union was because during the Cold War, the Soviet Union suffered from a total economic decline, deformed development, and a lot of grievances from the people. The USSR interfered with various socialist countries as big brother, leading to a large number of countries in Eastern Europe leaving socialism. After Gorbachev came to power, he carried out major reforms, which led to the collapse of the social system and plunged the economy into an even deeper quagmire. Estonia, Latvia, and Lithuania seceded, and Russia, Belarus, and Ukraine declared that their laws were superior to those of the Soviet Union. After the reunification of the two Germanies, Gorbachev was placed under house arrest by the State Emergency Committee. Russian President Boris Yeltsin immediately moved to abolish the State Emergency Committee and in turn demanded that Gorbachev hand over his nuclear warhead packages. Subsequently, the Soviet *** ended its activities in the country, and countries also withdrew from the Soviet Union, December 26, 7:38 pm, the Soviet Union flag was lowered from the Kremlin dome, the Soviet Union completely disintegrated.