Jim Wallis is an American author, theologian, and political activist known for his work in social justice and faith-based advocacy. He is the founder of Sojourners, a Christian organization that promotes peace, justice, and environmental stewardship. Wallis has written several books, including God's Politics, which explores the intersection of faith and politics. In addition to his writing, Wallis is a prominent speaker and commentator on issues such as poverty, immigration, and racial reconciliation. He has been involved in various movements and initiatives aimed at addressing these challenges, often emphasizing the role of faith communities in creating positive change in society.