TL;DR if you wish: World now is transitioning from G7 (which is G1 really) to real G20. Globalization caused rise of powers: China, India, Russia, Brazil, etc.

TL;DR if you wish: World now is transitioning from G7 (which is G1 really) to real G20. Globalization caused rise of powers: China, India, Russia, Brazil, etc. I think that world will be in better shape after that - concurrency and need for consensus among more than one player.