
Gorvachev, Man of the Decade! That's like giving credit for driving a truck to a guy who was run over by it.
Ronald Reagan was the Man of the Decade of the 1980s. If Time felt it should name multiple people, the most influential people of the decade of the 1980s were Reagan, Pope John Paul II, Lech Walesa, and Maggie Thatcher. Gorbachev falls into "1980s Tier 2", with Mulroney, Kohl, Mitterrand, and others.