Well, now it sounds like song lyrics. Sadboi rhetoric, good use of pathos, not sure who your team is that’s dying out. I can give you genetic links, family history, trees. follow paths and trails.
There’s different nations, ever changing borders, wars and conflicts. Religions and ideologies influencing each other and conflicting.
Different inventors and technology, different legal systems –
– is it homogeny you want or homogeny you fear?
I’ve done genetics too but no, genealogy is family trees, passed down in various records through the centuries.