In the 19th century, critics and audiences thought blacks were incapable of singing as well as their white, European counterparts. Greenfield forced them to reconcile their ears with their racism.
In partnership with his longtime collaborator, Dave Free, the greatest rapper of his generation is pushing himself commercially and creatively onto unexpected terrain.
After building a storied career that spans more than a decade, celebrity photographer Cam Kirk formed the Collective Gallery to help bolster other creatives' careers.
Music by Linda Ronstadt, Bonnie Raitt, Max Roach, The Four Tops and Wu-Tang Clan, speeches by FDR, and a Marc Maron-Robin Williams podcast are among recordings to be preserved by the Library of Congress. Listen to audio here.