The seven Great Powers (by varying definitions) in the 1930s were the United States, United Kingdom, France, Italy, Germany, Soviet Union, and Japan. Of these, the US and the USSR came into the 1950s as superpowers while the others were hobbled to varying degrees by the devastation of the war. Suppose a country with a pre-war GDP equivalent to France or Japan (perhaps 125% of Italy, 70% of the UK, USSR, and Germany, and 30% of the USA) survived the war with its economy intact and optimistically as well-positioned as the US as a result of wartime investments.
How could such a country's indicators of Cold War hard power - nuclear weapons, aircraft carriers, space launch capability, etc - compare to the superpowers and to other countries like the UK, China, and France (the other UNSC seats) that built and retained such capabilities after WWII? I would tend to presume that such a country would attempt to plot an economic and political course independent of the two superpowers, as the Chinese did the instant they thought they wouldn't get rolled over if the Soviets invaded (4 years after first nuclear test, 1 year after hydrogen bomb test), or the French, who tacitly aligned with the rest of NATO against the Soviet Union in Europe but otherwise acted quite independently of the US elsewhere.
How could such a country's indicators of Cold War hard power - nuclear weapons, aircraft carriers, space launch capability, etc - compare to the superpowers and to other countries like the UK, China, and France (the other UNSC seats) that built and retained such capabilities after WWII? I would tend to presume that such a country would attempt to plot an economic and political course independent of the two superpowers, as the Chinese did the instant they thought they wouldn't get rolled over if the Soviets invaded (4 years after first nuclear test, 1 year after hydrogen bomb test), or the French, who tacitly aligned with the rest of NATO against the Soviet Union in Europe but otherwise acted quite independently of the US elsewhere.