Ethical relativists and subjectivists hold that fact must be distinguished from
value, ‘is’ from ‘ought’ and reason from emotion. Their distinctions have
been called into question, notably by Philippa Foot (Natural Goodness 2001), also by
Alasdair Macintyre (Dependent Rational Animals 1999).
Reason in the form of the
life sciences—ethology, biology—indicates that what is good or bad for an individual
animal and its species are matters of objective fact. There is nothing relativistic about the idea
that fresh meat is good for wolves and it is a fact, a paradigm fact, that polluted water is bad
for dolphins. Moreover what is good for an animal is often something that is
good about it. Sharp ears and great speed are good for deer and are also what makes a
deer a good specimen of its kind.
These general remarks apply to the human animal as well
as to ‘ordinary’ animals. The good and bad discussed by moral philosophers cannot be
radically different from the good and bad known through reason. But if it were it would normally
be a remarkably indigent field of study.