[Taniwha]

You forget about Africa which seems to have the largest genetic diversity of Homo Sapiens (the prehistoric dispora seems to have been a genetic narrowing point) - that means wider tails on bell curves - it's why they have the tallest and shortest populations, the fastest (and probably slowest), etc etc

[inawarminister]

Yeah, the Khoisan seem to be the FIRST population group to diverge from mainstream homo Sapiens (or was it the other way around?), and IIRC supposedly compose half of humanity by numbers back 100,000-20,000 years ago. It seems Ice Age Central and Southern Africa were the best biome for hunting-gathering humans.

Of course, post-agriculture most humanity lives in (East and South) Asia, except in Cyrus' age where a third of humanity lives in West Asia and Eastern North Africa. Persia ruled 1/3rd of humanity then, the most out of any empire after that. Except perhaps China of some periods