In the great power struggle their can be no safe havens. All the world is a stage. And the sky too.

>All the world is a stage

Not really. Most of the cold war nuclear war scenarios only consider nuclear exchange in the northern hemisphere. Until this day there's little strategic value in south America or south Africa. Maybe Australia and new Zealand but still low compared to the north. The Argentinian Patagonia must be the safest place to be in a nuclear winter.