 While some philosophers argue that certain motives, such as malevolence or malice, are necessary for evil, others focus instead on motives or desires that evildoers lack. For instance, Adam Morton contends that evildoers are crucially uninhibited by barriers against considering harming or humiliating others that ought to be there (Morton 2004, 57). Similarly, Laurence Thomas contends that one distinctive feature of an evildoer is that “whereas normally a person’s moral sensibilities would get in the way of his performing an act of such moral gravity [i.e., one that results in serious harm], this does not happen when a person performs an evil act” (Thomas 1993, 77).