If Slimane can lay claim to defining much of the wardrobe of 21st-century men, Yves Saint Laurent undoubtedly did so for their female predecessors. He is the most important fashion designer of the past 50 years. “I tell myself that I created the wardrobe of the contemporary woman, that I participated in the transformation of my times,” Saint Laurent said, upon his retirement. Those sound grandiose statements, but they’re true.