He’s been called boring, a waffler, and a kook. But William Lyon Mackenzie King is also the longest serving Canadian prime minister. And there’s no denying that under his leadership, Canada was transformed from a minor player in the British Empire into a modern middle power, with great influence on the world stage. He’s also the history idol of historian Jack Granatstein who gives us a list of reasons to support his position in this podcast interview with Canada's History editor-in-chief Mark Reid.