If the USSR never collapsed in 1991 and the spread of communism continued, what would the world be like? Would Europe be mostly or completely communist? Would the USA and the USSR destroy each other with nuclear missiles? Would Korea already be unified or part of the USSR? Would the Soviet Union remain relatively the same size, grow, or shrink? Maybe the Middle-East would become communist as well. And what about space and the ISS? Would there be less cooperation between the USSR and the USA, or would there be another space race, taking the first humans out to Mars, return and base building on the Moon, more advanced rocket technology in use such as NTRs or SSTOs, space tourism? So many questions!