Bonhoeffer's Ethik (published posthumously in 1949, English translation Ethics, 1955; critical edition 2005) is a collection of manuscripts composed during the years Bonhoeffer was simultaneously participating in the Abwehr conspiracy and attempting to write systematic theology. The book is not a book in the ordinary sense. Bonhoeffer never completed it, never settled its architecture, and left multiple partial versions of key sections. Bethge's editorial reconstruction, later revised by subsequent scholars, produced the text that has circulated for seven decades. Its influence has been disproportionate to its unfinished character: the concepts of vicarious representative action, the penultimate and the ultimate, the four mandates of creation, and the ethics of responsibility all appear here, sketched with the urgency of a thinker who did not know whether he would have time to complete what he was beginning. He did not. He was arrested in April 1943 and executed in April 1945.
The book's unfinished character is substantive, not accidental. Bonhoeffer was writing an ethics adequate to a situation he described as admitting no pure action — a situation in which the pacifist must participate in plots to kill, the truthful must deceive, the law-abiding must conspire against the state. The theological tradition offered him two inadequate options: principle-based ethics that would have forbidden the conspiracy and situational ethics that would have justified anything the crisis demanded. Bonhoeffer refused both. He attempted instead an ethics of responsibility that accepted the burden of action in compromised situations without dissolving the compromise into either abstract principle or pure pragmatism.
The section titled "History and Good" contains the clearest statements of the ethics of responsibility. The section on the penultimate and the ultimate provides the framework for acting within history while remaining accountable to a horizon beyond it. The section on the four mandates (work, marriage, government, church) offers a concrete framework for analyzing the specific moral domains within which responsible action unfolds. Each section is independently usable; none complete the book Bonhoeffer would have produced had he survived.
For the simulation's purposes, the Ethics is the single most important primary source. The concepts the simulation applies to AI all originate here. The structure of the simulation's argument — that building is a moral practice, that responsibility extends beyond intention to consequence, that speed has an ethics, that the penultimate and ultimate must both remain present — follows Bonhoeffer's own architecture closely, adapted to a historical situation Bonhoeffer could not have anticipated but whose structure his framework illuminates.
The book also contains Bonhoeffer's most direct engagement with the problem of evil. Evil, he insisted, was concrete and specific, and it could be combated only by the specific actions of responsible people in specific situations. Abstract ethical principles — even correct ones — became hiding places when they substituted for concrete engagement with particular consequences. The AI equivalent the simulation develops is precise: the principle "AI will democratize capability" may be correct and may be morally inadequate, because the principle is abstract and the consequences are concrete, and the abstraction permits the person who holds it to avoid the concrete question of what is happening to specific people.
Bonhoeffer began the ethics manuscripts in 1940 and continued writing until his arrest in April 1943. The manuscripts were preserved by his family and Bethge; the first German edition appeared in 1949, and the text has been substantially re-edited since. The current scholarly standard is the critical edition published as volume 6 of the Dietrich Bonhoeffer Works (Fortress Press, 2005).
No pure action. The situation admitted no clean option; the responsible person must act within compromise.
Responsibility extends to effect. The moral weight of an action includes the consequences it makes possible, not only those it intends.
The penultimate and ultimate must both remain present. Neither the concrete historical situation nor the final horizon can swallow the other.
The four mandates structure moral life. Work, marriage, government, and church are distinct domains with distinct moral obligations.
Evil is concrete. Abstract principles are hiding places; engagement occurs with specific consequences of specific actions in specific situations.