My specific personal research based on peoples displaced are that the people who inhabit the present landmass today were not the same ones who are the original inhabitants of the past!
As an example, take the area known as the Caucasian mountains (despite the hype and the unnatural history associated with it Hitler and his henchmen on the origin
of x people), where the original inhabitants (hint like the Tsarniev brothers) were kicked out/displaced/removed) and sent o other area of the former Soviet Empire. They were originally Muslims within the presence of Christian minorities (read Armenians and others) and when the latecomers rewrote history, they left out the original peoples. HINT: it is the winners who write history--The Golden Rule. So when these original inhabitants come back to claim their ancestral home, they are looked upon as usurpers and people who have no history. IT is a pattern that is seen daily.
1, Look at Australia today and people will claim there is no way that the indigenous native people could have owned that based on the present societal indices of social and economic presence
2, Look at the native people of the Americas, Once were Warriors but now relegated to slaving their own land and relying on begging (the rule) just to keep their own land
3, One good thing about Africa is that the people are still there but theft of human resources has been rampant for centuries
4,Even the Sanskrit vs Tamil disparity is present since those 'blue' black people are incapable of a civilization (sound familiar
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5. 500 years is a long time so why should any continent be any different! Cultures change, people take over form their previous geographic location and inherit the culture of their former master or slaves and they carry it forward into the future
6, Trying to keep it short
When fascism comes to US America, It will be wrapped in the US flag and waving a cross. An astute patriot