Inevitabe, yes. That answer was easy. The harder question is how to achieve it, once achieved, how to maintain it and in the maintenance, what are the mechanics? What is the political philosophy? What is the economic philosophy? How is freedom defined, achievement, wealth? Is the worship of differing gods permitted, if so, peace is questionable, as well as unity.
The United Nations is such an organization, but in reading the Charter and the manifesto on human rights, one might think that it was written by Marx instead of with the oversight of the the President of th United States.
Before your question is realized other questions have to be answered and the ones above are just the beginning. There is but one species of human life and we have designated ourselves, as homo sapiens-sapiens, essentially reasoning beings. This has to be accepted, as the one and only human identity. Given where we are at today with regard to race, the gods and another damning characteristic, the blind desire of a few to control the many, It may be a long time before such questions can be dealt with, reasonably.