All my life I heard, “most countries on top only stay on top for about 200 yrs.. and the US is overdue”.
Maybe it’s just our time to fall. I still hold long term future growth to the African continent, just from a mathematical perspective. Not as many entrenched systems, a 50 yr effort towards elimination of extreme poverty that has been successful and continues to. It has a weather problem though: unpredictable, no nice mountains to keep weather in check. But with proper architecture for key systems, the growth already seen in the African continent will continue.