Philadelphia Society for Alleviating the Miseries of Public Prisons

The Philadelphia Society for Alleviating the Miseries of Public Prisons was formed in 1787 in response to the harsh conditions of Philadelphia's jails, especially the Walnut Street Jail. Early supporters included prominent Philadelphians such as Benjamin Rush, and sources also connect the movement with figures including Benjamin Franklin and Bishop William White.

The society became one of the earliest and most influential prison reform organizations in the United States. It investigated jail conditions, pressed lawmakers to change prison practices, and played an important role in shaping ideas about reform, discipline, and incarceration in Pennsylvania, including the thinking that led to the Walnut Street penitentiary and later Eastern State Penitentiary.

After keeping its original name for about a century, the organization became the Pennsylvania Prison Society. Its legacy is complicated: it was founded to reduce cruelty and improve prison conditions, yet some of the reforms it supported, especially solitary confinement, later drew deep criticism. Even so, the society remains a key part of the history of prison reform in Philadelphia and beyond.