This is a speculated distribution of humans in 200 CE:
1) Australia is an uninhabited continent; all humans were wiped out. Let's leave the cause alone, since this is irrelevant.
2) The classical four empires: the Han Empire, the Roman Empire, the Kushan Empire, and the Parthian Empire, still thrive.
3) Siberia is practically uninhabited; an offshoot of Han settlers carried Native Siberians away and settled near the current Yekaterinburg.
4) North Africa is settled; only a few larger tribes survive in Sub-Saharan Africa.
5) A few larger tribes survive in North America; in South America, humans hardly hold their ground.
What will be the fate of Australia and the Americas?
How will these four empires interact?
What may happen in Sub-Saharan Africa?
1) Australia is an uninhabited continent; all humans were wiped out. Let's leave the cause alone, since this is irrelevant.
2) The classical four empires: the Han Empire, the Roman Empire, the Kushan Empire, and the Parthian Empire, still thrive.
3) Siberia is practically uninhabited; an offshoot of Han settlers carried Native Siberians away and settled near the current Yekaterinburg.
4) North Africa is settled; only a few larger tribes survive in Sub-Saharan Africa.
5) A few larger tribes survive in North America; in South America, humans hardly hold their ground.
What will be the fate of Australia and the Americas?
How will these four empires interact?
What may happen in Sub-Saharan Africa?