>>7396 (OP)
To be entirely fair, the British Empire was being dismantled before Churchill took office. During the First World War the British promised their colonies independence Real Soon Now in exchange for letting the Brits draft hundreds of thousands of Indians and Kenyans and Rhodesians then stuff them into the meatgrinder at Ypres and the Somme. The decisions and the promises had already been made, just like the Balfour Declaration ("thank u for helping us make boolits, we gibs u Palestine nao"). Churchill's every action made everything worse at every turn and I believe he reduced Britain's stock in the world, but he did not start the process and I am not sure how much he could have done to change the eventual outcome significantly.