Soviet Union. Whilst the USA has possibilities, the Soviet Union has limitless possibility. The Breznhev Stagnation hasn't truly set in yet, so political reforms, reinstituting the NEP, and reigniting the space race ("one of our comrades, first man to Mars!") should a) extend the lifespan of the Soviet Union at least another twenty years and b) force the West to be a better group of societies. It's no coincidence that democratic socialism, the common good, corporate regulation and accountability and other such ideas have faded since 1990.
I have a theme, so it'll continue.
You wake up one morning to discover you are either a) the Joker (in Heath Ledger/Killing Joke extremist mode) or b) Bolivar Trask (without looking like Peter Dinklage). Which is easier on your conscience?