I agree that all cultures had influences from other cultures, but for example, in the case of China, yes they were influenced by different cultures in neolithic times (all of which were internal in the Chinese mainland), but they created a culture that was completely distant from pre-civilized Japanese and Koreans. The Chinese created a unique writing system that was later adopted by both the Japanese, Koreans and Vietnamese. Even though there are slight differences in the writing systems they use, it still originated from the Chinese. China did in fact later on in its history adopted some cultural ideas from other foreign cultures (such as Buddhism), but most of Chinese culture developed internally for most of it's history. As for the Greeks, they adopted many cultural aspects from the Eastern Mediterranean and the Greeks were distant from those east of them, but the things they adopted, the Greeks never created. What I mean by "original" is that one thing that was created by one society that was not created by another society. When the latter society adopts the creation of the former society, even though they innovated upon that idea, it still does not make the latter society original. They just innovative or re-invented an idea that already exists.You don't seem to realize that words and concepts can carry different meanings in different contexts, and that you are moving from one use of the term 'original' to another, and making a value judgement based on a lingusitic confusion. Except for certain cultures in very early times, no culture is in fact totally self-enclosed, and that is as true of China after a certain period as it of Japan , but putting that aside, you are moving from one meaning of 'original', relating to a civilization that is primarily at least developed of internal influences, to another meaning of 'original' when you imply that a civilzation like that of Japanese or Greek, as being more open to external influences (or might say, suggestions) that some others, is less 'original' in the sense of having less right to claim that it has introduced things that are new and distinctive into the world. There are quite a number of aspects of Greek culture that are no less original in the latter sense any aspect of Egyptian or Mesopotamian culture; and European culture of the early modern period did not sacrifice any of its originality in the latter sense by being open to the world, quite the opposite in fact.