"I disagree with you about Europe building it up from nothing. Where Germany and Italy were ruined some countries came out almost untouched like GB or Spain. And all of Soviet factories were behind Ural anyway, they were not ruined by war but by Stalin."

You can disagree, but you probably did not live in Great Britain, Spain nor the Soviet Union. GB did invest each penny into that War during five years and an important part of industrial England got destroyed by German bombs.

Spain got destroyed during the Spanish Civil War during the 1936-37 period and had no way to recover from ruins after that, because there was no economic life in Europe until 1950.

Stalin destroyed the big and median farmers by himself before the war and then had to beat the Germans at huge sacrifize after the rest of Europe had been defeated. It destroyed and paralyzed most of Russia for a long time.