 One prominent justification of whistleblowing is due to DeGeorge (2009). According to him, it is permissible for an employee to blow the whistle when his doing so will prevent harm to society. (In a similar account, Brenkert [2010] says that the duty to blow the whistle derives from a duty to prevent wrongdoing.) The duty to prevent harm can have more weight, if the harm is great enough, than the duty of loyalty. To determine whether whistleblowing is not simply permissible but required, DeGeorge says, we must take into account the likely success of the whistleblowing and its effects on the whistleblower himself. Humans are tribal creatures, and whistleblowers are often treated badly by their colleagues. (Shultz and his family were hounded by Theranos’s powerful and well-connected lawyers, at a cost to them of hundreds of thousands of dollars.) So if whistleblowing is unlikely to succeed, then it need not be attempted. The lack of a moral requirement to blow the whistle in these cases can be seen as a specific instance of the rule that individuals need not make huge personal sacrifices to promote others’ interests, even when those interests are important.