"Most global fashions aren’t fads. They arise from centuries of tradition and don’t go out of vogue when the seasons change" — “Striking Photos of Cultural Fashions You Have to See,” National Geographic
As a response to customers who often make comments to the effect of "I think ethnic/tribal is big this year" or the converse, "I think the whole ethnic thing has gone out of fashion"...this article goes some way in pointing out that this not "fashion" in the ephemeral sense. While "traditions" themselves are not static (they are certainly subject to adaptation and migration of people and ideas) these things are largely rooted in culture and time and place. There is little doubt that at times others adopt the parts and pieces of these differing cultures to a greater or lesser extent. But we need to expand our world view here and realize the larger undercurrents of cultural influences as they arise in our own cultural fashions and norms. They are always present to a greater or lesser extent. There is not one design trend without some "non-western" or "other" cultural influence present at any given time, some degree of cultural appropriation (a loaded term and a discussion for another day!), fashion and design are more than ever global in nature. The idea of "purity" has no place in any discussion of culture, whether in fashion or as a root source of xenophobia for that matter.