To outsiders, luxury fashion is a curious industry where consumers seem to irrationally shell out hundreds and thousands of dollars for sneakers, handbags, wallets, or T-shirts. But take a step inside, and you’ll find the world of high fashion is more like Game of Thrones with Italian, English, and French houses like Gucci, Louis Vuitton, YSL, and Balenciaga fighting to be the king. For the houses...