Well, if you want more detail about what I believe (while understanding that I do not claim to have all the answers), my best guess is that the entire world is going to follow the US down the sewer. We are being destroyed by our own prosperity. Without struggle, I’m not sure we have any purpose.
My best guess: the US will implode over the next 30 to 50 years. You can already see it starting. Many of your cities look like shit and smell like piss. Some of them look worse than third world hell holes. It is not sustainable.
Following the US will be the entire western world, including Canada, Europe and Australia. All of these people have fallen into self indulgence and self gratification. Worse, the people have started to disrespect their own bodies, becoming fat and drug addicted. The children in these places are soft little turds who think the world owes them a living. I’d give these nations perhaps 20 years more than the US before they too implode.
Then there is Asia. They will have a long reign at the top in my opinion, perhaps a hundred years. They are less self indulgent and they work harder, so I expect them to last much longer. Still, in the end, they too will succumb and the world will be full of fat, drug addicted losers.
Off to the side are South America and Africa, neither of which have any real chance of dominating the world. They’ll stumble along as well as they can but it is the west and Asia that will determine the world’s fate imo.