Taking the critical turn is one of the main tools of the humanities and inculcates an intellectual discipline that prevents ossification of thinking about issues and of organizational policies in clinical ethics. The articles in this "Clinical Ethics" number of the Journal take the critical turn with respect to cherished ways of thinking in Western clinical ethics, life extension, the clinical determination of death, physicians' duty to treat even at personal risk, clinical ethics at the interface of research ethics, and (...) the pertinence of the Hippocratic Oath to clinical ethics. These articles challenge clinical ethicists to inculcate the intellectual discipline of the critical turn into everyday practice and continuous quality enhancement of clinical ethics. (shrink)