> This map is cool, but I'm still embarrassed to say I don't understand the concept of "indigenous" particularly well or why Europe, Africa, and Asia have so few indigenous people

The Wikipedia page for Indigenous peoples claims that the majority of indigenous people live in Africa and Asia. [0]

My first thought for indigenous people in Asia would be Tibetans, but if I google "are Tibetans indigenous?" it appears to be a matter of debate.

0: https://en.wikipedia.org/wiki/Indigenous_peoples