There is not a single black C.E.O. at the top of a luxury brand, and almost no black designers. Women are not yet close to parity, though they are making progress. Why it is imperative that the luxury industry starts to look like the rest of the world? At The New York Times’s International Luxury Conference in Brussels, Rebecca Robins, Global Director, Interbrand and Eric Underwood, Ballet Dancer and Model spoke with Elizabeth Paton, European Styles Correspondent, The New York Times.