In 1815 Friedrich Gentz noted: “Napoleon's downfall was a pure and unqualified advantage for Russia; for the rest of Europe, and especially for the states bordering on Russia, it was largely balanced by the increased strength that she secured for herself at the expense of the general equilibrium. For this great power there is virtually no further real danger; if she attacks her neighbors her greatest risk is merely diat she may fail in her purpose and have to postpone her venture to a more favorable time. The difficulty of penetrating Russia's interior is now so generally recognized that only lunacy and despair could prompt an attempt to conquer this great empire. While the other states of Europe exhausted themselves in the struggle against Napoleon, Russia who allied herself with him understood well how to extract the most solid benefits from the ephemeral union. It would be easy for her to fall upon her neighbors, for she has so many greedy ambitious reasons for trying it, and, if the expression be allowed, such substantially centrifugal habits, that war, which others regard as a necessary evil, will always be to the Russians a matter of choice, of emotion, and of speculation.“