Here are some links to petitions against solitary confinement. Please consider signing as many as you can.
https://www.change.org/p/ban-solitary-confinement-in-united-states-prisons
https://pac.petitions.moveon.org/sign/stop-the-abuse-of-solitary
http://expertwitnessagainsttorture.com/petitions-against-solitary-confinement/
https://prisoneractivist.wordpress.com/actions-activism/petitions/solitary-confinement-2/
http://www.nrcat.org/torture-in-us-prisons/statement
http://uulmnj.org/have-you-signed-abolish-solitary-confinement-petition-in-defense-of-human-dignity/