Talleyrand was the first to appreciate that if Napoleon were to topple the Bourbons and represent himself as the de facto ruler of France, and then accept the terms of the Treaty of Paris, the other signatories of that treaty would, legally speaking, have no grounds for not recognising him, and certainly no justification for hostilities against him. The only way of avoiding this was to disqualify Napoleon himself, and that is what Talleyrand promptly set out to do.
