(1) rigid system; The system of the Soviet Union failed to keep pace with the times and could not meet the growing needs of people's material and cultural life, thus losing the support and support of more and more people, which was the fundamental reason for the disintegration of the Soviet Union.

(2) economic recession; During the Cold War, the long-term arms race between the United States and the Soviet Union made the Soviet Union bear a heavy economic burden. Behind the apparent prosperity is an irreversible economic recession.

(3) the accumulation of various contradictions in the Soviet Union; For a long time, the national strength of the Soviet Union has been extremely unbalanced, and ethnic contradictions between and within the participating countries have accumulated over time, which has not been alleviated. This is another important reason for the disintegration of the Soviet Union.

(4) the leader's factor. Since the last leader of the Soviet Union, mikhail gorbachev, came to power, he has implemented the wrong reform route, which thoroughly intensified the internal contradictions in the Soviet Union.

(5) Western influence. Especially in the United States, during the cold war between the United States and the Soviet Union, both sides regarded each other as their number one imaginary enemy. In the absence of direct war, the infiltration of the west into the Soviet Union and the recovery of Yunnan never stopped. Therefore, the disintegration of the Soviet Union, the influence of the West can also be described as "indispensable"!

CIS (short for CIS) is indeed the product of the disintegration of the Soviet Union. But it should be inherited from the Soviet Union. Or the CIS is a product left over from the Cold War, which only plays a transitional role (from the disintegration of the Soviet Union to the formal independence of participating member States).

As for Chechnya, it was originally a part of Russia. Only in Chechnya, many troops and armed forces are officers of the former Soviet Union.