Hip-hop’s most thoughtful MC goes by a new name—Yasiin Bey. But what’s really evolved is his style: a genre-crashing, bohemian mix of influences from Savile Row to Michael Jackson Mos Def may have ...

Now, more than ever, hip-hop seems to be on a divergent path: Half its practitioners are thugging and mugging, while others—led by The Roots and OutKast—opt for the high road by adding actual ...