What produced this extraordinary occurrence? What were its causes? The historians tell us with naive assurance that its causes were the wrongs inflicted on the Duke of Oldenburg, the nonobservance of the Continental System, the ambition of Napoleon, the firmness of Alexander, the mistakes of the diplomatists, and so on.

Consequently, it would only have been necessary for Metternich, Rumyántsev, or Talleyrand, between a levee and an evening party, to have taken proper pains and written a more adroit note, or for Napoleon to have written to Alexander: “My respected Brother, I consent to restore the duchy to the Duke of Oldenburg”⁠—and there would have been no war.