After seeing the sidetracking of "who will America conquer/liberate next" I pose this question in its own forum: Could Europe(probably meaning just the UK) have defeated the Nazis and guarantee a non-Soviet western Europe. Try to keep this country bashing free and try to use documents to back up your opinions.
My opinion: without US aid democracy in Europe would probably be limited to the UK(and Sweden, maybe). I think that the UK could hold out against, but not defeat the nazis(the vast majority of UK fighters in the Battle of Britain were built there, yes?). As evidence I supply this the wartime GDPs of the Axis and Allied powers. Look at the GDPs of the UK, the US, the Germany, and the USSR. You will see why I draw my conclusions.
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