Right, for now, but what about the future? The ingredients for diversity of language and culture are isolation and time. If you send some friends to the other

Right, for now, but what about the future? The ingredients for diversity of language and culture are isolation and time. If you send some friends to the other side of a river, or a mountain, or a wall, or an ocean, or to a different planet, and then stop communicating much for a long time, languages will be newly created again. The question is not if, but when and why will this kind of isolation happen again.