Legalities don't drive profits. If anything the US was simply lucky in thr 50s to not be war torn and rebuilding it's cities post war.
The only thing special is our geography and history. It's really hard to launch an attack unless you're in Canada and Mexico. So the US smartly made treaties and agreeemtns instead of repeating the bloody history Asia and the now EU went through as they constantly battled neighbors.
Only Australia has such a similar advantage and instead they had to war with nature's deadliest critters trying to kill them (they arguably lost).
