[piercehawkeye45]

I agree Classicman, but how will we know when we are at our last option and how do we know that is the best in every scenario?

Some wars, such as WWI and WWII, are ones we were more or less forced into, but others, as Iraq, are ones that could easily be prevented. I wouldn't necessarily say we should strive to prevent war at virtually all costs no matter the situation, but avoid unjustifiable wars at all costs. In WWII, laying down every option to avoid war with Germany wouldn't have solved anything, but just upped the death toll of Poles, Jews, etc. We have to have a basic outline of what a justifiable war is and try to avoid the unjustifiable wars, while doing our best at preventing justifiable wars, but not hesitating if our involvement is inevitable.