Pangea

Conceptual model. 180 million years ago the Earth was very different from today, there was one sigle large piece of land in the middle of a single large sea. There was a super-continent called Pangea and only one big ocean called Tethys. Men weren’t there yet and everything was also more peaceful.
Then the continental drift started and, right as a consequence, the drift of civilization. This process is still continuing and, through collisions of tectonic plates, inner tensions, volcanic eruptions and athmosferic events, it continues distancing single worlds separating them with oceans of different mentalities.
Nothing doing. It is a force, intrinsic to the planet which, even in a time where we can reach every place of the planet in a few hours, it acts deeply, dividing and discerning, distancing ad separating.