Indeed, that is what had happened to the League of Nations and why the US never joined.
Also the UN is still an important platform where diplomatic relations are upheld even in dire situations. Even with Russia it is important to have some lines of discussion.
It is a shame the international community has taken so little effort to prevent bloodshed. The terrible terrorist attacks are the symptoms of the unhealthy and hostile environment. The numbers in the link below just show that there was enough reason to put more effort and discussion in this region.
https://www.ochaopt.org/data/casualties