One of the most popular brands in the world, particularly when it comes to undergarments, is Calvin Klein. His unpretentious, stylish aesthetic elevated American fashion to parity with Parisian couture. He was the sole architect of the 1970s designer jean trend and, throughout the 1980s, of the popular uprising in fashion marketing. Today, his name may appear on everything from perfume to lingerie. And he has established a fashion empire with his chic designs and business skills.