"For Bonhoeffer, the foundation of ethical behaviour lay in how the reality of the world and the reality of God were reconciled in the reality of Christ. Both in his thinking and in his life, ethics were centered on the demand for action by responsible men and women in the face of evil. He was sharply critical of ethical theory and of academic concerns with ethical systems precisely because of their failure to confront evil directly. Evil, he asserted, was concrete and specific, and it could be combated only by the specific actions of responsible people in the world. The uncompromising position Bonhoeffer took in his seminal work Ethics, was directly reflected in his stance against Nazism."