Lisa Sowle Cahill examines the issues surrounding the meaning of being a disciple of Jesus as it relates to pacifism and just war. She brings together strands from church history, biblical scholarship, and theology to show how Jesus' words led to both pacifism and just war theory. Landing on the side of pacifism, Cahill argues for the ideal of the kingdom of God brought near at the Sermon on the Mount. Lisa Sowle Cahill is Professor of Christian Ethics at Boston College.