Abstract
Ethical codes have been widely put in place by professional associations, universities and other organizations. They observe common standards and procedures which are applied and adapted to local or specialist needs. The early codes such as that of Nuremberg exclusively addressed the rights of participants. This article detects a shift in emphasis. The argument relies on a distinction between morality and ethics and it is contended that ethical codes legitimize kinds of practice that are morally unprincipled. In modern formulations of research ethics there is a tendency to abdicate responsibility for the protection of rights and interests and to pass it from researchers to participants or subjects. The concern is rather more for the security of investigators than for that of participants. It is recognized that codes are here to stay but suggestions are made to recover the spirit of Nuremberg.