You can learn more about the prison abolition movement at the links below:
UPDATE: Jane Stokes shared that this would not be an unprecedented move for Friends. In 1981, Canadian Yearly Meeting approved a minute in support of prison abolition. You can find that here.
UPDATE: The New York Times Magazine published an excellent profile of prison abolitionist Ruth Wilson Gilmore in April 2019 entitled, "Is Prison Necessary?" You can find that article here.