 Thus, while most theorists agree that the concept of evil can be harmful or dangerous there is considerable disagreement about what conclusion should be drawn from this fact. Evil-skeptics believe that because the concept of evil is harmful or dangerous we should abandon it in favour of less dangerous concepts such as badness and wrongdoing. Evil-revivalists believe that because the concept of evil is harmful or dangerous more philosophical work needs to be done on it to clear up ambiguities and reduce the likelihood of abuse or misuse. Card and Kekes argue that it is more dangerous to ignore evil than to try to understand it (Card 2002 and 2010; Kekes 1990). For if we do not understand evil we will be ill-equipped to root out its sources, and thus, we will be unable to prevent evils from occurring in the future.