Quote:
Originally Posted by Dirty Dane
Foreign girls would marry you for love.
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spot on!
If the entire world was open border it would probably mean that humans had taken the next evolutionary step i.e. no nationalism, no warfare and as mentioned probably no general welfare system. You simply went where you could succeed and there would only be a safety net for those who couldnt succeed on there own be it from injury or handicap etc.
In other words maybe several hundred years if humans survive that long.