Music programs in prisons cultivate hope and dignity, while reducing the chances of re-incarceration. But journalist Maurice Chammah says that's only one side of the story — that listening to music made by incarcerated people has the power to change people on the outside. Here's his 2023 story for The Marshall Project on the history, impact and potential of prison music. "Listening to and sharing music may sound like a soft, superficial way of changing a broken system, but you can’t get policy change if you haven’t paved the way with culture," he writes.