Ronald J. Sider (1939-2022) was professor of theology, holistic ministry, and public policy as well as director of the Sider Center on Ministry and Public Policy at Palmer Theological Seminary. A widely known speaker and writer, Dr. Sider was also president of Evangelicals for Social Action, publisher of PRISM magazine, and a contributing editor to Christianity Today and Sojourners magazines. His Rich Christians in an Age of Hunger was recognized by Christianity Today as one of the one hundred most influential religious books of the twentieth century.