It is often contended that certain enhancement technologies are acceptable, because they simply update traditional ways of pursuing the improvement of human capacities. This is not true with reference to moral bioenhancement, because of the radical difference between traditional and biotechnological ways of producing moral progress. These latter risk having serious negative effects on our moral agency, by causing a substantial loss of freedom and capacity of authentic moral behaviour, by affecting our moral identity and by imposing a standard conception (...) of moral personality. (shrink)