Visionary. Genius. Style Icon. Yes, the quirky developer of the theory of relativity was indeed a Trad in his day. Teaching at the University of Princeton, he fit right in at the traditional institution by wearing lots of knit sweaters, tweed jackets, and indeed cardigans. As a great alternative to a blazer or any jacket for that matter, cardigans can dress up any outfit by adding a level of sophistication to the ensemble. They may not make you an actual genius but when it comes to great style: It’s all relative.