A German Lutheran pastor and theologian. After extensive theological training in Germany and America, Bonhoeffer worked as a chaplain and lecturer in systematic theology at the University of Berlin during Hitler’s rise to power. Along with Karl Barth, whose theology had a lasting impact on Bonhoeffer, he signed the Barmen Declaration in 1934 in opposition to the Reich government. After short stints as a pastor in London and as a professor at Union Theological Seminary in New York, he returned to Germany and became involved in Reich resistance. As a result, Bonhoeffer was arrested and, tow years later, executed at the age of thirty-nine. Although a Lutheran, Bonhoeffer’s theological works share many features with Reformed theology, and his more practical works, such as The Cost of Discipleship and Life Together, have wielded enormous influence within evangelicalism.