The “urban” curves for China and India in 2018 don’t look all that far apart from the China/India curves in 2005. It’s like only the urban cities improved their incomes for these two very large nations.
The USA curve may look less over-achieving if we also throw in the curves for Japan, Western Europe, and/or Australia.
Don’t even want to think about what the curves would look like for the oil exporters not engulfed in wars, like Saudi Arabia, Qatar, the UEA, Kuwait, or Brunei.