When historians in the future look back at the 21st Century, the historical theme they will see is Tribalism versus World Law.
During the previous century, not only were all the ‘terra incognitas’ on the world’s maps eliminated but the nations and peoples of the world became interdependent, thanks to modern technology and modern transportation. ‘Globalization’ is only one aspect of that change. Viruses and plagues can now be transmitted worldwide in a matter of days. Pollution in any one country affects other or all countries. Etcetera.
Whether or not the nations and peoples of the world have the wisdom to cooperate and solve or prevent problems is the big question. Will nations and peoples revert to tribalism (ethnic cleansing, unilateral actions, etc.) or will they work together?