 Behavior is normally described as altruistic when it is motivated by a desire to benefit someone other than oneself for that person’s sake. The term is used as the contrary of “self-interested” or “selfish” or “egoistic”—words applied to behavior that is motivated solely by the desire to benefit oneself. “Malicious” designates an even greater contrast: it applies to behavior that expresses a desire to harm others simply for the sake of harming them.