If overunity devices and anti-gravity technology is released to the world will communities/villages/towns/cities/countries which have experienced an influx of immigrants become homogeneous again? The reason I am asking this is because if this technology IS released to the world, there will no longer be any reason for people to emigrate as the entire planet will transform into a paradise. I think most people would prefer to stay in their country but things like war, poverty, famine, bleak prospects force them to emigrate.