Ethical Realism

November 25, 2010

Can Morality Be Known Through Science?

Can science lead to moral knowledge? If so, moral naturalism is true.

Naturalism is the philosopher’s jargon for saying “based on natural science.” “Moral naturalism” is the view that morality is part of the reality studied by science (physical reality) and can be known by science, but “moral naturalism” has more specifically become jargon for the view that there are moral facts and they can all be studied by science.1 “Empirical” knowledge (or justification) is knowledge attained through observation and experimentation (the scientific method).2 Naturalism is almost synonymous with “empiricism,” which is the view that we can know everything from observation—and “moral empiricists” would think that all moral knowledge is attained through observation and experimentation. (more…)


July 14, 2010

A Review of Moral Realism by Torbjörn Tännsjö

One of the defenses for moral realism that makes use of common sense was given by Torbjörn Tännsjö in his book Moral Realism published in 1979 and revised in 1990. The reason that his argument makes use of common sense is because it demystifies the strangeness of morality by opening us up to the fact that moral observation is possible. Tännsjö technically mainly only defends moral realism because he argues that there is no good reason to reject moral realism of the sort he defends. If his defense succeeds and we can fully justify his beliefs, then the following argument for moral realism is implied:

  1. If we have moral knowledge, then moral realism is true.
  2. We have moral knowledge.
  3. Therefore, moral realism is true.


Blog at