Interesting story which I didn't know. However, the author perspective is a bit flawed:

But the world did get more peaceful. There was no World War III, and countries at least had to pay lip service to these universal values of peace and human rights.

The world didn't really get more peaceful. Some nations which used to wage wars between themselves did not anymore after World War II (excluding "incidents" like Belgrade bombing). This doesn't diminish the rest of the article at all, if anything calls for more rules and diplomacy preventing war.