I would argue that there were two distinctly different Churchills.
The second and older wiser Winston had to redeem the actions of the first (with a great need to have redemption to spare) rash and impetuous younger Winston. The reason - the poor performances he exihibited while one of the political and military engineers of the disastrous Dardanelles landings at Gallipoli and other actions while he was associated with the Admiralty during WWI. He was an example, as we all are, of the theory of the diacodomy of the individual human. (Esoteric or what?
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I also believe that Churchill did redeem himself with distinction. He was an inspiration to not just England, but the entire free world. Perhaps if FDR had listened to Churchill' warnings about Stalin... another subject for another thread.