How does the fashion industry influence the world?

The fashion industry has an impact on the world because its starts new trends, decides whether things are 'cool' or not and everyone wants to wear what models in the fashion industry wear.

Someone wears something. It goes popular. Everyone buys it. That fashion company earns money. All the other companies copy. The fashion industry is rich for a few months. Then everyone thinks it is old. No-one wears the style anymore. Then someone wears something else. Everyone likes it. And so-on.