Radical Acts of Justice tells the stories of ordinary people joining together in collective acts of resistance: paying bail for a stranger, using social media to let the public know what everyday courtroom proceedings are like, making a video about someone’s life for a criminal court judge, presenting a budget proposal to the city council. When people join together to contest received ideas of justice and safety, they challenge the ideas that prosecutions and prisons make us safer; that public officials charged with maintaining “law and order” are carrying out the will of the people; and that justice requires putting people in cages. Through collective action, these groups live out new and more radical ideas of what justice can look like.