Everyone remembers the role of Churchill and Roosevelt throughout the war, but there was a third man key to their relationship and of the three of them the only one to remain in power at the end of the war in August 1945.

Mackenzie King was the Prime Minister of Canada, the largest British Dominion and America's closest neighbour. By the start of the war, King knew both FDR and he'd been friends with Churchill since first meeting in 1905. He would serve as a lynchpin between the great powers, yet is now often overlooked.

Joining me is Neville Thompson.

Neville is a professor emeritus of history at the University of Western Ontario, where he taught modern British and European history. He is also the author of the wonderful book The Third Man: Churchill, Roosevelt, MacKenzie King, and the Untold Friendships That Won WWII which recounts the relationship between the three men based on King's personal diaries.

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