For more than 100 years "Lift Ev'ry Voice and Sing" has been known as the Black national anthem. Rep. James Clyburn says it's time for it to be honored as the national hymn, and on Jan. 13, he filed a bill to try to make that official.

Clyburn told USA Today that making it a national hymn would help unite Americans.

To make it a national hymn, I think, would be an act of bringing the country together. It would say to people, 'You aren't singing a separate national anthem, you are singing the country's national hymn,'" said Clyburn, the highest-ranking Black American in Congress. "The gesture itself would be an act of healing. Everybody can identify with that song."

Adopted by the NAACP as its official song back in 1919, "Lift Ev'ry Voice and Sing" started off as a poem by James Weldon Johnson, a writer and activist from Jacksonville, Fla. His brother, John, set it to music, and it was then performed in 1900 to commemorate Abraham Lincoln's birthday.

The hymn, steeped in over a century's worth of history, is a powerful ode to Black pride and liberation.

Historian Lloyd Washington — who is, like the Johnson brothers, from Jacksonville — tells NPR's Morning Edition that many people in his hometown do not know the actual origins of the song. He says he's made it a part of his life's work to preserve the brothers' legacy.

But it's been hard at times to get people to care. Then recently, he says, the Black Lives Matter movement embraced the song, and Black pop stars once again reinvented the hymn for a new generation.

"One person I must give credit to is Beyoncé Knowles," he says. "A few years back, she did a concert, and for a lot of young Black people, that's the first time they ever heard the song."