What caused the collapse of the soviet union?

A series of event led to the collapse of the soviet union. The following will explain. I know its a bit much but if this is an essay question the explanation is perfect for you.

Explanation:

Hungarian Revolution: a revolt in Hungary in 1956 that was brutally suppressed by the Soviet Union. Despite this failure, the Hungarian Uprising showed the S.U that its satellites and republics were not content to be ruled by the Soviet government in Moscow.

Prague Spring:  protest for democratic reforms in Soviet controlled Czechoslovakia in 1968. In 1968, Alexander Dubček attempted to implement reforms in Czechoslovakia to bring aspects of democracy to his country.  

Solidarity:  a trade union in Poland, founded in 1980; it was the first independent trade union in a Soviet-controlled nation. Workers went on strike to improve working conditions. They created the first independent trade union in a Soviet Communist country. Later it became a political party and participated in Poland's first free elections brought about by demands for reform.  

Velvet Revolution: In November;December of 1989, Czechoslovakia went through the Velvet Revolution. Student demonstrations and popular protest led to the defeat of the Communist Party's control of the country and the return to capitalism and democracy. In the first elections, voters elected Alexander Dubček to the position of Speaker of the Parliament. They also elected Vaclav Havel to the position of president. In 1993, Czechoslovakia officially disbanded and became the separate Czech and Slovak Republics.

Fall of the Berlin Wall: In 1989, communist Hungary removed the fence controlling its border with non-communist Austria. The 2 Germany's started a process of reunifying. In 1989, the East German government removed restrictions on travel to the West. The government opened the Berlin Wall. The demolition of the Berlin Wall became the symbol of the fall of the S.U and the return to democracy. In 1990, East Germany and West Germany signed a treaty that reunified the two countries again. - This was the breaking point where the fall of the soviet union could be seen

Romanian Revolution: The satellite nation- Romania demanded its independence from Soviet control in 1989. In December 1989, protestors clashed with the brutal Communist Party government. Romanians died, but in the end they overthrew Ceausescu's government, and both he and his wife were executed. This conflict became known as the Romanian Revolution. Romania was no longer a Communist-controlled country.

When the Soviet Union's oil and gas revenue dropped dramatically, the USSR began to lose its hold on Eastern Europe. Meanwhile, Gorbachev's reforms were slow to bear fruit and did more to hasten the collapse of the Soviet Union than to help it. ... On December 25, Gorbachev resigned as leader of the USSR.

follow me..m

Nikita Khrushchev.

Khrushchev replaced Stalin in 1958, five years after Stalin died, during which he fought for power with Georgy Malenkov.

Khrushchev was responsible for what we call the "De-Stalinization of the USSR". This referred to the actions of removing the cult that surrounded Stalin, his political system, and the Gulag system. All these were in effort to get rid of the "cult of personality" Stalin had set in place, which was simply propaganda marking him as an all-powerful super-leader of sorts.

Khrushchev was also the first to place emphasis on the Soviet space program, and set forth some reforms of the Soviet domestic policy. Khrushchev was also behind the wheel of the USSR in some notable crises, such as the Cuban Missile Crisis in 1962 and the U-2 Incident in 1960.