Amidst the more pressing events of the war in Iraq, the oil price spiral and forthcoming American and Australian elections, the death of Ronald Reagan on June 4 is an occasion to reflect on how one man can change the course of history.Ronald Reagan, who as Republican candidate was widely derided as a B-grade actor in American Westerns, was elected President of the United States in 1980, succeeding the personally decent but naive Democrat, Jimmy Carter, who had presided over a calamitous decline …