In this season of surging Canadian nationalism, it’s worth remembering that defining ourselves in opposition to the United States is both an old reflex and a risky one. While understandable, even necessary in certain contexts, excessive anti-Americanism has sometimes led Canada and Canadians down dangerous, counterproductive paths. No case illustrates this better than that of George Taylor Denison III, a man who let hostility to the United States overtake his judgment, his patriotism, and ultimately, his future.