Paul Simon told Joe Boyd that when he first heard the accordion flourish that would open his multi-platinum album , it seemed to proclaim, “You haven’t heard before!” Yet the 1980s “world music” boom that Simon’s album helped usher in had roots that extended back through the decades and across continents: tango on the eve of World War I, Latin dance across the ’30s, ’40s and ’50s, reggae in the ’70s, pre-War samba and pre-Beatles bossa nova, Eastern European ensembles filling capitalist concert halls during the Cold War, Indian ragas changing rock and roll in the 1960s, the folk music–inspired classical composers of the 19th and 20th centuries. In this sweeping history compiled from more than a decade of travel, research, interviews, and deep listening, Boyd sets out to explore centuries of fascinating backstories to these sounds. He shows how personalities, events, and politics in places such as Havana, Lagos, Budapest, Kingston, and Rio are as colorful and momentous as anything that took place in New Orleans, Harlem, Laurel Canyon, or Liverpool. And, moreover, how jazz, rhythm and blues, and rock ‘n’ roll would never have happened if it weren’t for the notes and rhythms emanating from over the horizon. The one-of-a-kind result is : a glorious, symphonic celebration of the music that shapes our world.