Mikhail Gorbachev
Indirectly, this may have helped cause the end of the power of the Communist Party of the Soviet Union (CPSU), and the break-up of the Soviet Union into smaller countries. However, it should be noted that the need to modernise the economy, and to conduct government less ruthlessly than Stalin, was agreed by the previous two leaders. They, Andropov and Chernenko, were elderly and died before real changes could be put in place.