Hume's Enquiry Concerning the Principles of Morals › The Central Insight

::: {.callout-note title="Hume's Core Thesis"} Moral distinctions are derived from moral sentiments, not from reason. We approve of virtues because they are either useful or agreeable, either to ourselves or to others. Reason informs our judgments by revealing consequences, but sentiment alone provides the motivation to act. ::: This sounds simple. Its implications are radical. Consider what happens when you call an action "wrong." According to Hume, you are not describing a property of the action itself, the way you might describe a ball as red or round. You are expressing a sentiment of disapproval. The wrongness is not "out there" in the world waiting to be discovered. It is "in here," in the distinctive feeling that human psychology produces when confronted with certain kinds of behavior. This does not make morality arbitrary or subjective in any simple sense. Human nature is remarkably uniform across cultures and historical periods. We share a common psychology that produces similar sentiments in response to similar situations. The person who feels no disapproval at gratuitous cruelty differs from us because something has gone wrong with their moral faculty, just as something has gone wrong with the color-blind person's visual faculty. But it does mean that morality is grounded in human nature rather than in abstract reason or divine command. If we were constituted differently, if we lacked sympathy for others or felt pleasure at their suffering, our morality would be different too. There is no view from nowhere, no God's-eye perspective from which moral truths can be read off the structure of reality.