But again, if you accept the circular logic of appeasement - that always puts the burden of proof on the non-aggressor - then you will never learn these, or any other lessons.
Some students of international affairs argue that, while a nuclear power might retaliate against a non-nuclear aggressor, it would never dream of doing so against a nuclear neighbour which, in its turn, would have been deterred from invading in the first place.
"If you maintain a calm, non-aggressive manner it's a well-known fact that eventually the aggressor will mimic your manner and calm down, " says Mr Eason.