The role of witness is a recurring theme in the work of Stanley Hauerwas: it is through enacting the truth in a world of lies, through seeking peace in a world of violence, that witnesses show who God is, who we are, and what the world is like. The Necessity of Witness is a study of Hauerwas and his fascinating but complex understanding of witness. Ariaan W. Baan argues that Hauerwas's approach makes a significant contribution to current debates in systematic theology on the relation...