I believe that Americans have an invalid view of history. I freely admit that most Americans have no real sense of history, as an academic subject. TV news shows often present interviews with the “average American,” who, when asked basic historical questions can give no answer—not even an approximate one. However, there is another type of history that Americans identify with. It is a different type of history. It is the type, which is used as follows: “History will judge X for doing Y.” This is pretty much what Karl Marx meant when he used the word. It is a mass movement and a spirit of the times that “guide” events in one way and not another. It is a wide spread sense of what should be, or what will be. For example, the current rush to legalize single gender “marriages” and marijuana would be considered an “idea whose time has come.” That is, history will judge and nudge it to be fair, proper and timely.
This view of history had the USA move across the continent from the East Coast to the Pacific, conquering or eliminating everyone in the way. In this view America inevitably grows larger, richer, more powerful, more inventive, etc. That is, Americans believe in inevitable progress. The idea that the USA could contract, or lose territory is, literally, inconceivable.
Even when they do not expect much progress in the near future (most Americans are not THAT stupid), they feel that progress should occur and that it is an unusual circumstance that aborts it. I summarize this view as follows: “America is Number One, and wins in any fair contest.”
Europeans see things differently. The educated and ruling classes there know long histories of defeats, of gaining and losing empires, of having their countries conquered, of native territory taken away, apparently forever. They not only suffer invasions and lose wars. They also suffer plagues, famines, droughts, savage revolutions, chronic poverty, etc. They do not necessarily see the future as automatically better. They do not see themselves as automatic victors in a conflict.
Despite all this the European, obviously, still exists. That is, no matter how bad things can get, they have survived and can survive again. For example France has been invaded and (essentially) conquered by the English, Germans and Russians. And France survived. Hungry was once ruled by Attila the Hun. The Balkans were enslaved by the Turks. Poland ceased to exist at one time. This attitude towards resignation and endurance forms the European personality and policy. This is why, in my opinion, Europe, even if the current US president were to pressure it, will not support any strong measures against Russian aggression.
To them the loss of the independence of the Ukraine is not so significant. It has been independent before and enslaved before, and probably these will happen again, etc. There is a fatalistic streak in the mentality of the Europeans, which weakens them. The Mongols came, saw, conquered… and left. The new version will probably do the same.