Why was Mikhail Gorbachev an important leader in the history of the USSR? Check all that apply.
He called for reforms to try to help the USSR out of its economic troubles.
He was the general secretary of the Soviet Union.
He was elected as the president of the Soviet Union.
He received the Nobel Peace Prize in 1983.
He made reforms that resulted in major social changes to the country.
He was a former member of the Russian KGB (intelligence group).
