William Lyon Mackenzie King

William Lyon Mackenzie King, commonly known as Mackenzie King or WLMK, was a Canadian statesman and politician who served as the tenth prime minister of Canada for three non-consecutive terms from 1921–1926, 1926–1930 and 1935–1948. A Liberal, he was the dominant politician in Canada during the interwar period from the 1920s through the 1940s. He is best known for his leadership of Canada throughout the Second World War (1939–1945) when he mobilized Canadian money, supplies and volunteers to support Britain while boosting the economy and maintaining morale on the home front. With a total of 21 years and 154 days in office, he remains the longest-serving prime minister in Canadian history. Trained in law and social work, he was keenly interested in the human condition, and played a major role in laying the foundations of the Canadian welfare state.