One important aspect of moral internalism, as Lei Zhong (2013) makes clear, turns on the issue of the role of affect in motivating moral judgment. This is a complicated issue, not only because there are important differences among types of psychopathy with regard to affect, but also because there are important distinctions and connections to be made between affect, cognition, moral judgment, and moral action.
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Citation
Gallagher, S. (2013). Phronesis and psychopathy: the moral frame problem. Philosophy, Psychiatry and Psychology, 20 (4), 345-348.