Abstract
Biological theories about the nature and origin of ethics are important, j both because they may be largely true, and because distorted versions are sometimes effective in moulding people's ethical beliefs in curious i ways. The pernicious effects which sometimes follow the application of biology to ethics stem from an assortment of misinterpretations, while, correctly interpreted, even the most extreme biological determinism need not be supposed to diminish the worth of conscious individuals, nor be incompatible with genuinely ethical behaviour