He had the second shorted term as Prime Minister but was part of Pierre Trudeau’s cabinet for a long time. Many say he quit the Liberal party because of always butting heads with Trudeau.
He was Canada’s justice minister when Canada decriminalized homosexuality and during the FLQ crisis.
When he was liberal leader he fought tooth and nail with Mulroney over free trade (that’s what I remember him for mostly).
He had an interesting and meaningful life. He loved Canada and did his best to get and do what he thought was best for Canadians.