The naturalistic fallacy is mentioned frequently by cvolutionary psychologists as an erroneous way of thinking about thc ethical implications of cvolvcd behaviors. Howcvcr, cvolutionary psychologists arc themselves confuscd about thc naturalistic fallacy and usc it inappropriately t0 forestall legitimate cthical discussion. We briefly rcvicw what thc naturalistic fallacy is and why it is misused by cvolutionary psychologists. Then wc attempt t0 show how thc cthical implications 0f cvolvcd behaviors can bc discussed constructivcly without impcding cvolutionary psychological research. A kcy is t0 show how ethical behaviors, in addition t0 unethical behaviors, can cvolvc by natural selection.