I think they did one of these on Japan that was linked to in this forum earlier.
The five ways are Stalin kills fewer smart people, no Truman Doctrine, they build up their military and attack NATO in the 1970s, they forgo the military buildup in the 1970s and concentrate on internal reforms, and they copy what the Chinese were doing in the 1980s. I know, at least two of these were contradictory.
The article makes a good case that basically Brezhnev and his cronies blew it.