In 1914, Wilson ran on a platform featuring the slogan: "He kept us out of war" . Not long after the re-election, it was off to the trenches !
Some fat cat sold that one as "the war to end all wars". Didn't quite work out, since US congress rejected the league of nations. So, another war was needed. War industries board, Baruch, Sam Bush, Remington Arms, Bolsheviks, Schiffs, Warburgs, copper futures. Even after formation of the UN, more wars were "needed" - the profits for the few being so enormous, it's irresistible. What an era of change that was.