Millions Danced Joyfully to Her Song. She Drew on Her Pain to Write It.

It starts with a clap, and then the feet tap along to the beat: four times on each side, followed by a quick jump. As the melody rises, dancers dip low and twirl.

It’s a dance easy enough for anyone to learn, and people all around the world have done so, with everyone from an urban dance crew in Angola to Franciscan nuns in Europe

on social media.

The “Jerusalema” dance, named for the South African hit song that…