Commentary Last week’s G-7 meeting in Cornwall reminded us of how the whole concept of summit meetings has been trivialized. The first such meeting in modern times of more than two leaders of Great Powers was the Congress of Vienna in 1814 and 1815, where the leading personalities were the host, Metternich,-the “Coachman of Europe,” the ineffably devious French Foreign Minister Talleyrand, Viscount Castlereagh and the Duke of Wellington for Great Britain, ushering in the Pax Britannica, and the representative of the Holy See Ercole Cardinal Consalvi. These were exalted and epochal figures; they ostensibly produced the Holy Alliance of Russia, Prussia, Austria, France, and Great Britain, which was determined to maintain all governments in Europe in place and suppressed revolutions, whatever their causes and wherever they occurred in Europe. This was too reactionary and interventionist a regime for Britain, and apart from suppressing a comparatively liberal government in Spain …