Guideline for determining when it is morally permissible to perform an action to pursue a good end with knowledge that the action will also bring about bad results. It generally states that, in cases where a contemplated action has such double effect, the action is permissible only if: it is not wrong in itself; the bad result is not intended; the good result is not a direct causal result of the bad result; and the good result is "proportionate to" the bad result. (from Solomon, "Double Effect," in Becker, The Encyclopedia of Ethics, 1992)

The philosophy or code pertaining to what is ideal in human character and conduct. Also, the field of study dealing with the principles of morality.