Natural Ethics and the Ethics of Divine Command

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The tension between eudaimonist or otherwise natural ethics and the ethics of divine command goes back to Plato’s Euthyphro, where we ask whether right is right because the God says so, or if God says so because it is right (philosophers sometimes call this the Euthyphro dilemma). Divine command theory, which affirms the former, featured in work by Ockham, Kierkegaard and Barth, and even appears in Locke and Berkeley [Honderich, 2005, “Divine command ethics”]. Nonetheless, even today Christian scholars can attest to the historical dominance of natural ethical thought in the West:

Indeed, St. Aquinas held that many parts (thought not all) of the divine law revealed in scripture could be derived from natural law, because the “light of natural reason” is perfectly in sync with the Eternal Reason God uses to govern a perfect community.

The Catholic tradition’s moderate acceptance of natural reason as one of the four sources of light (along with scripture, tradition and experience) was significantly weakened in mainstream protestantism’s emphasis on sola fides. It is not at all uncommon in America today to hear Christians interpreting Paul’s denigration of the “wisdom of this world” so as to discount non-Biblical sources of motivation writ large. The natural impulse toward good became more emboldened, however, in branches of protestantism that approached the soteriology of moral influence (as opposed to penal substitution) – especially in the Unitarian traditions.

Greenwood and Harris [2011] add that “for centuries, Unitarianism has existed as a creed less faith because of this belief that growth is godly; that belief limits and love expands.” This is one end of the spectrum of Christian humanism. Of course, Servetus made enemies of...

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...t action can then be derived from this aesthetic model, bringing order and a consistent definition of virtue to a messy and contingent world.

The realist lives in accord with the world as she sees it, working from within it. The idealist lives in accord with the world as she wishes it to be, working, in a sense, from outside the world as we know it.

The divergent outcomes of realist and idealist ethics must be what William James had in mind when he spoke in Pragmatism of the importance of temperament in defining whether one preferred empiricism to rationalism. Just as the rationalist looked to mathematics as an ideal mind-world from which important truths could be derived, Kant’s idealism brings him to the categorical imperative, which stands as morally binding regardless of the empirical situation. It is on ethics that temperament has its impact, not metaphysics.

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