Yesterday the news broke that Mikhail Gorbachev, former President of the Soviet Union, had died at age 91. He has been hailed by many world leaders for his "remarkable vision", his "impact on the course of world history", and for ending the Soviet Union. But his life converged with 3 great men and women. They were the big 4. Boyd looks at what would have happened if even one of those players hadn't been a part of history at the same time. 

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