ORIGINAL: irrelevant
I think that we Americans, having had considerable success in many previous conflicts, have come to believe that war is in general a fairly effective way of making things go the way we'd like them to go. I think that historically we have been fortunate in having our wars result mostly from the miscalculations of our foes. In our wars that have occurred as a result of our own miscalculations, we have had less success. I think if you look at history, the decision to start a war has nearly always turned out to have been a poor one, regardless of whose decision it was.
Good points. I would add also, that the combatant that can adapt to the changes in a campaign as far as tactics go can overcome miscalculations and mistakes, provided they are not too big i.e. Stalingrad, Midway.[:)] The Soviets on the Ostfront were perfect examples of learning from your mistakes to turn the tide.
As to your last statement I couldn't agree more.