Latin America is modernizing in bits and pieces - a lot of vitality in certain regions and most of the cities. Yes, I see them as an up-and-comer. And behind them, Africa, which has a long, long way to go and if you ask me is now going through it's period of moving from tribalism to nation-building very much the way Dark Ages Europe did and in just as bloody a manner in many places.
China is pretty well poised to play a huge role in the world right now, and so is India if they can avoid a major war with Pakistan and the Taliban.
Japan, even more than Europe, has a serious problem with an aging population which will make for one of two things or both - a very nasty transition period of too many elders per worker until the population levels off at a lower fertility rate; or, remarkable advances in robotics. Both are apparently happening.
Okay - here's the lineup -
On the downhill slope:
Japan, still strong but in a demographic bottleneck.
Europe, same but less so.
The United States, poised at the top with much argument about whether or not we're headed downhill at a high rate of speed. Who can tell? Hey - we're 4T, a time when such things are decided.
China, waiting in the wings.
India, just a bit behind them.
Russia, still picking itself up and dusting itself off - probably will be focused on internal affairs for quite some time.
Latin America as you said, nascent and may burst out of the starting gate at any minute.
Africa, still duking it out a la post-Roman Europe. The parallel with post-Colonialism is fairly clear to me.
Anyone here have other opinions? Besides the "we're all DOOMED" which is a totally different scenario and one that the reading of my youth (Golden Age Science Fiction) explored in depressing enough detail to totally frighten my GI mother, for whom this was not entertainment but reminders of the narrow escape I was too young to remember much about).
How to spot a shill, by John Michael Greer: "What you watch for is (a) a brand new commenter who (b) has nothing to say about the topic under discussion but (c) trots out a smoothly written opinion piece that (d) hits all the standard talking points currently being used by a specific political or corporate interest, while (e) avoiding any other points anyone else has made on that subject."
"If the shoe fits..." The Grey Badger.