I didn't make my point very well. What I am saying is that there was an absolute force in the wars prior to the UN forming. It was more about breaking the will of the populace than defeating an army in some regards. The US went into Iraq and Afghanistan and started nation building from the start. In WWII, they decimated the entire continent without regard for civilian life, and THEN they started rebuilding things. There is a difference I think.
For example, I remember in Iraq there would be a dude with a backpack FULL of Cash. He was sent by HQ and his job was to pay back families who had damaged property, livestock or had people wounded or killed. That was his job, to give people cash.
Can you imagine that happening in WWII?