There was no international order before ww2. Besides, the US was easily the largest economy and arguably the greatest naval power ( matching the british empire ) for decades before ww2. The pre-ww2 era was an era of major powers ( US, british empire, russian/soviet empire, germany, japan, etc ). And even then, it was the US forcing them to accept our version of the "international order".
https://en.wikipedia.org/wiki/Washington_Naval_Treaty
French is an offical language of the UN, but so is mandarin, arabic, russian, spanish, etc. Using your logic, the chinese, egypt, russia, etc ruled the world?
There has been one international world order. The american world order. The british empire never created one. Neither did the french, russians, chinese or arabs.
What basic principles and norms? The international world order, like all order, is ruled by the fist ( or might ). A lot of people had to die and will continue to die for "order". "Priniciples and norms" are just fluff we make up to distract from or justify the fist.
Lots of people would want to "upset the apple cart". Do you really think the chinese or the russians or even the germans or japanese or eventually the indians or any other major nation wouldn't want to be top dog?