Kelefa Sanneh

"The entire history of popular music over the past fifty years refracted through the big genres that have defined and dominated it-including rock, country, punk, R&B, dance and hip-hop-woven together into a cosmic reckoning with music's evolution as a popular art form, as a huge cultural and economic force, and as an essential component to our identities, from Black Sabbath to Black Flag to Beyoncé, and beyond"--