what were his achievements in the final role?
He was became a Canadian Ambassador to the United States and also had an important part in founding both the United Nations and the North Atlantic Treaty Organization.
Lester B. Pearson
he became the second Canadian Ambassador to the United States on 1 January 1945. He remained in this position through September 1946.

Pearson had an important part in founding both the United Nations and the North Atlantic Treaty Organization.
who was harold innis? He was a professor and an author. what subjects did he teach? Political economy. in which university did he teach? University of Toronto. what is the origin of the subject mentioned above? It originated in moral philosophy, to explore the administration of states' wealth, with "political" signifying the Greek word "polity" and "economy" signifying the Greek word "oikonomía" (household management).. what are some of the new approaches to the subject? Modeling economic policy and political institutions concerning interactions between agents and economic and political institutions. when did the aforementioned professor start teaching at the university? In 1920. are there any well-known former students of this university? Governors General Vincent Massey, Adrienne Clarkson, and Julie Payette, Prime Ministers William Lyon Mackenzie King, Arthur Meighen, Lester B. Pearson and others. where is the last person from? Canada. what sort of work was he involved in? He was a  scholar, statesman, soldier, prime minister, and diplomat.
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Lester B. Pearson [SEP] Diplomat, public servant
Pearson returned to Ottawa for a few months, where he was an assistant under secretary from 1941 through 1942. In June 1942 he was posted to the Canadian Embassy in Washington, D.C., as a ministerial counsellor. He served as second-in-command for nearly two years. Promoted minister plenipotentiary in 1944, he became the second Canadian Ambassador to the United States on 1 January 1945. He remained in this position through September 1946. Pearson had an important part in founding both the United Nations and the North Atlantic Treaty Organization.