Final answer:
Mackenzie King played a key diplomatic role in World War II, contributing to post-war peace negotiations and shaping the international stage.
Step-by-step explanation:
Mackenzie King played a key diplomatic role during World War II, contributing to post-war peace negotiations. He was instrumental in organizing and attending conferences such as the Atlantic Conference, the Quebec Conference, and the Yalta Conference, where important decisions regarding the post-war world were made.
His diplomatic efforts helped establish the United Nations and the Bretton Woods system, which aimed to promote international cooperation and economic stability after the war. King also advocated for the establishment of the International Monetary Fund and the World Bank.
While King did not directly lead Canada's military efforts in Europe or implement economic reforms to stabilize the Canadian economy during the war, his contributions in diplomacy were crucial in shaping the post-war world and establishing Canada as a respected player on the international stage.