Mikhail Gorbachev was the last leader of the Soviet Union, serving as General Secretary from 1985 to 1991 and implementing key reforms such as glasnost and perestroika that contributed to the end of the Cold War. Born in 1931 in Stavropol, he rose through the Communist Party ranks and introduced significant political and economic changes, which eventually led to the dissolution of the Soviet Union. After leaving office, he remained active in politics and global issues, criticizing post-Soviet leadership and advocating for democracy and environmental responsibility.