This article is based on an exchange between Peter Kemp and Jacob Dahl Rendtorff on the occasion of Peter Kemp’s seventieth birthday in 2007. It presents the development of Kemp’s ethical philosophy from his philosophy of technology and technology ethics to his philosophy of bioethics and biolaw. It also discusses Kemp’s relation to Existentialism, hermeneutics, phenomenology, and Marxism with the development of a critical hermeneutic philosophy of engagement. This is related to Kemp’s work on humanistic ethics of technology in his book on the ethics of the irreplaceable. The article presents Kemp’s long discussion with Paul Ricœur about the ethics of the good life and about narrative ethics. Finally, it elaborates on the bioethical turn towards an ethics for the living world and discusses the role of basic ethical principles of autonomy, dignity, integrity, and vulnerability in relation to cosmopolitan and global responsibility for sustainability and humanity.