What would be the world without human migration?

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In my opinion that would be what we refer to here as ASB (Alien Space Bats).

Essentially, this is not possible. Humans have been migrating and moving since...well, since before we were humans. The earliest primates migrated between Africa, Asia, and the Americas, and their descendents continue to do so. To prevent migrations, whether accidental or deliberate, you would need a massive change in human psychology as well as magically impassible barriers. Questions which require these sorts of fiat are generally described as being made possible by theoretical godlike beings called Alien Space Bats, and per site rules should be put in the appropriate sub-forum, as the pre-1900 sub-forum is meant for very plausible questions.

But okay, that's enough rules lecturing from me. I think that the type of societies we'd see would, across most of the planet, NOT consist of villages. Oh, villages will exist in a few areas where food is abundant, but without migration or cultural interchange from prehistory, farming would either not exist or would be very limited. Without farming, most people would survive as hunter-gatherers, and this would require adapting a migratory or semi-migratory lifestyle. Within their territory, populations would live in small, extended-family bands probably not much larger than 150 people at most. Conflict which could not be resolved by coming to consensus would be resolved by the band splitting apart. Abstinence, abortion, infanticide, and in some areas intertility-causing plants would keep populations low. These societies would generally be very democratic and egalitarian, although violence between rival bands could be quite gruesome even if limited.

The most populous and technologically advanced areas in this scenario would be the Pacific Northwest in North America and the fertile river valleys that gave birth to civilization IOTL, since these would definitely have enough resources to feed a sedentary population. We'd see coastal cities rising and falling around the world depending on what seafood resources can be gathered. The ability of these cities to survive will depend on the stability of the climate.
 

Lusitania

Donor
But if no migration there is a change that 90% of earth would be devoid of human beings, the Americas would be a prime example since there is no evidence of humans evolving in the two continents prior to human migration. If we have different primate groups evolving then see could see different species co-existing on same planet but not interaction. From all information I have read they would be situated in Africa (maybe in some other parts of Asia but Europe Australia and Americas plus all islands empty of humans.
 
But if no migration there is a change that 90% of earth would be devoid of human beings, the Americas would be a prime example since there is no evidence of humans evolving in the two continents prior to human migration. If we have different primate groups evolving then see could see different species co-existing on same planet but not interaction. From all information I have read they would be situated in Africa (maybe in some other parts of Asia but Europe Australia and Americas plus all islands empty of humans.

In some cases that'd be true, though if human groups simply expanded into adjacent, empty areas (eventually filling much of the globe), you might not call that migration in the societal sense (which typically involves migrating to where there are already other people.

Additionally, you'd probably have Neanderthals in some areas, Homo Sapiens in others. We might scarcely recognize one another as 'human.'
 

RousseauX

Donor
In some cases that'd be true, though if human groups simply expanded into adjacent, empty areas (eventually filling much of the globe), you might not call that migration in the societal sense (which typically involves migrating to where there are already other people.

Additionally, you'd probably have Neanderthals in some areas, Homo Sapiens in others. We might scarcely recognize one another as 'human.'
Another thing: without migrations agriculture will be adopted at a significant slower pace: OTL a combination of farmers spreading out and taking land from hunter-gathers and hunter-gathers adopting nearby community's agricultural techniques was what led to farming societies. You could well see hunter-gathering remaining dominant for thousands more years in Europe and Asia.
 
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