Jim Wallis is an evangelical Christian preacher, public intellectual and editor of Sojourners magazine. He says his latest book is designed to promote what he calls "an ancient but timely idea and practice — the common good." Abraham Lincoln famously said, "My concern is not whether God is on our side; my greatest concern is to be on God's side." On God's Side is Wallis' latest book. The subtitle is, "What religion forgets and politics hasn't learned about serving the common good."