It seems that the empirical evidence in support of situationism raises a challenge for our commonsense conception of agency. According to situationism, empirical research shows that commonsense explanations of actions in terms of character traits (such as honesty, kindness, or courage) are systematically mistaken or inaccurate, because this research shows that the actions in question are better explained in terms of situational features (Ross and Nisbett 1991; Harman 1999; Doris 2002). But none of the common philosophical theories of agency say that actions are to be explained in terms of the agent’s character traits, and so it seems that situationism does not raise a problem for the standard theory and other philosophical accounts of agency. Moreover, the interpretation of the empirical evidence in question and the argument for situationism have been controversial (Sreenivasan 2002, for instance). It has been argued, however, that this evidence raises the further question of whether we are genuinely reason-responsive. The evidence suggests that our actions are, under certain conditions, driven by situational and morally irrelevant factors even when there are salient moral reasons to act otherwise. This suggests that we (or most of us) are not as reason-responsive as we would like to think. But it is controversial whether or not the evidence supports any stronger claims than that (for more on this see Nelkin 2005; Schlosser 2013; Vargas 2013).