you should have understood by now, but what can I say, you're slow. by the same process any Civilization influences the tribes and "barbarians" around it, obviously. the modern Western civilization is rooted in Greco–Roman cultural, and how that is I've already explained multiple times. Germany, France, Scandinavia did not have developed cities, enough to sustain the intellectual development that happened in Rome and Greece. what formed the basis of their intellectual thought was obviously fucking Greek and Roman, since that was the only fucking material available. if you still cannot grasp the concept of "intellectual tradition" and "Civilization", please don't reply.