What does it take to ignite a revolution? Guns? Bombs? Guerilla warfare? In late-1980s Estonia, it took songs. After the people had lived under the burden of Soviet occupation for decades, a movement began with the singing of a series of patriotic songs. These songs birthed the “Singing Revolution,” which played a key role in restoring Estonian independence in 1991.

As one writer put it, “This was a non-violent revolution that overthrew a very violent occupation,” says a website describing the movement. “But singing had always been a major unifying force for Estonians while they endured fifty years of Soviet rule.”

Music…