Keep in mind that with some way to emigrate away as a Realm to carve out a new home on another Continent will help preserving that culture. Of course the culture will evolve from there, and not everything will survive, but it does get a good aid to establish itself.
I'm pretty sure Tom will have the final say on this matter. He's just letting us debate so he can come to the right conclusion and to find the best method to do this.
