Because of Canada's traditionally mild manners in world affairs, foreign-policy debates in Parliament have often seemed stale and tepid. Last week's scheduled debate gave no special promise of being any exception. Less than 48 hours before he was to lead off the discussion, Lester ("Mike") Pearson, Secretary of State for External Affairs, was still in New York, at the United Nations meeting. On his way back to Ottawa he stopped off for the opening of Toronto's Royal Winter Fair. He came into Ottawa on a morning train, having written part of his speech en route; he put the finishing touches...