Your challenge, should you choose to accept it, is to end the Cold War with neither power being destroyed, or collapsing. Instead, the Cold War is just to... peter out. Both powers have to learn to grudgingly accept the existence of the other, and give up the arms race.
Also, Soviet system can't collapse. Can be reformed, i.e. become Market Socialist for example, but no shock economics this time.
Also, Soviet system can't collapse. Can be reformed, i.e. become Market Socialist for example, but no shock economics this time.