ple who lacked certain feelings fail to act morally? That is, is moral action contingent on having certain feelings? If so, which feelings, precisely?...

Would people who lacked certain feelings fail to act morally? That is, is moral action contingent on having certain feelings? If so, which feelings, precisely? Lay out what Aristotle, Hume, Kant, and Mill would say. Which answer is most plausible?

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