Why is William lyon Mackenzie king on the 50 dollar bill?

William Lyon Mackenzie King is featured on the Canadian $50 bill as a tribute to his significant contributions as Canada's longest-serving prime minister. He held office for over 21 years across three non-consecutive terms and played a crucial role during pivotal moments in Canadian history, including World War II. King's leadership helped shape modern Canada, and his legacy includes advancements in social policy and the establishment of a welfare state. The bill honors his impact on the country's development and governance.