I'm not sure. If that was true, colonization of America by Europeans would not have succeeded. If they succeed to put up some bases and a workable, extensible a

I'm not sure. If that was true, colonization of America by Europeans would not have succeeded. If they succeed to put up some bases and a workable, extensible agriculture (honestly I doubt I will see that within my life time), colonists will come - and bring in or have their children there.