Grounding morality in God's commands makes right reduce to might, so theism does not secure objective morality and can sanctify atrocity

The argument at its strongest

The argument is not merely the familiar internet complaint that "religious people need a book to tell them not to murder." Serious atheist and secular philosophers usually do not put the matter that crudely. The stronger claim is about grounding: if a theist says that moral obligations are objective because they rest on God's commands, then the theist owes an account of why those commands generate moral authority rather than merely expressing overwhelming power. That target matters, because many divine command theorists try to ground duties in command while grounding goodness or value in something deeper than command.

The classic form comes from Plato's Euthyphro: is the pious loved by the gods because it is pious, or is it pious because the gods love it? In contemporary terms: is an action good because God commands it, or does God command it because it is good?

The critic presses both horns.

• First horn: If an act is good simply because God commands it, then morality seems arbitrary. If God commanded cruelty, cruelty would become good. If God commanded genocide, genocide would become obligatory. This looks less like morality and more like sovereignty: right becomes whatever the strongest being decrees.
• Second horn: If God commands an act because it is already good, then goodness is not grounded in God's command. God may be a perfect recogniser or communicator of moral truth, but moral truth itself stands independently of command. In that case, divine command theory does not provide the foundation it promised.

This objection is pressed by philosophers such as J. L. Mackie, Michael Martin, Walter Sinnott-Armstrong, Louise Antony, and Wes Morriston in different forms. Their targets are not identical: some attack divine command theory as a theory of moral language, others as a theory of moral obligation, and others as a practical ethic of obedience. The objection is also connected to a moral worry about religious obedience. If a community treats any act as obligatory once it is sincerely attributed to God, then command-language can sanctify atrocity. Critics often point to religious defences of the killing of the Canaanites: if the only decisive answer is "God ordered it," then the structure of the reasoning seems to permit exactly what morality is supposed to forbid.

That is a serious argument. It should not be dismissed as anti-religious prejudice. It identifies a real danger in any moral outlook that prizes obedience while weakening independent moral reflection.

What the argument gets right

The argument succeeds against a crude command-voluntarism: "whatever God commands is obligatory or good solely because God commands it, and there is no further account to be given." That view does seem vulnerable to arbitrariness. It also makes moral language unstable. If all moral vocabulary is reduced to "commanded by God," then saying "God is good" risks meaning little more than "God commands what God commands." That is not a morally illuminating claim. This is why most serious defenders of divine command theory distinguish moral obligation from moral goodness and do not treat every moral term as a synonym for "commanded."

The argument also rightly exposes the danger of moving too quickly from "God has authority" to "any alleged divine command must be obeyed." Human beings are fallible interpreters. Even if a divine command theory were true, it would not follow that every person claiming divine authorization should be trusted. History gives enough examples of people attributing violence, domination, and cruelty to sacred authority that the burden of caution is very high.

Finally, the Canaanite example is not a cheap shot when directed at those who actually defend the event by appealing only to divine command. A more sophisticated theologian may offer additional arguments: divine judgement, unique historical context, hyperbolic war rhetoric, or other interpretive qualifications. But when the defence is simply "God commanded it, therefore it was right," the critic is entitled to ask whether this principle has any moral limit.

The strongest theistic reply

A major contemporary reply is not the crude view above. Philosophers such as Robert Adams, William Alston, Philip Quinn, C. Stephen Evans, John Hare, and others have developed more careful forms of divine command theory. One influential family of views is often called modified divine command theory. It should also be noted that many theists do not accept divine command theory at all, preferring natural law, virtue-theoretic, or theistic Platonist accounts; so the Euthyphro objection is best aimed first at command-based accounts of obligation, not at every possible theistic ethic.

On this view, moral obligation is grounded in God's commands, but God's commands are not arbitrary because they express God's essentially good nature. God does not invent goodness by sheer fiat, nor does God consult an external moral standard that outranks him. Rather, God's nature is itself the ultimate standard of goodness, and divine commands communicate obligations suitable for creatures like us.

So the theist rejects the dilemma as a false dichotomy. The options are not only:

• goodness is created by command, making morality arbitrary; or
• goodness exists independently of God, making God unnecessary.

There is a third option: goodness is grounded in God's nature, while obligations are grounded in God's commands. God commands the good because he is good, but the good is not independent of God in the way mathematical truths might be independent of a ruler's decree. It is rooted in what God is.

Robert Adams, for example, argues that moral wrongness consists in being contrary to the commands of a loving God. The word "loving" matters. It is not a decorative adjective; it is part of the theory's attempt to block the worry that a malicious deity's commands could generate genuine moral obligations. On this account, a cruel, sadistic, or deceptive being would not be God in the morally relevant sense and would not possess the authority that divine command theory attributes to God. A critic may still ask how we identify perfect love without using moral standards in advance, but Adams's view is not the simple claim that any powerful supernatural command makes an act right.

This reply has real force. It shows that many popular versions of the Euthyphro objection attack an oversimplified target. Serious divine command theorists do not usually say that God could make torture of the innocent good by commanding it. They tend to say that such a command is impossible because it would contradict the divine nature.

Does the reply work?

It works partly. It defeats the simplest charge of arbitrariness. If the theist's claim is that God's commands necessarily flow from a perfectly good nature, then divine command theory is not equivalent to "might makes right." Power alone is not doing the moral work. Character is.

But the reply also faces hard questions.

First, what does it mean to say that God's nature is good? If "good" simply means "whatever God's nature is," then the account again risks circularity. "God is good" would reduce to "God has God's nature." To avoid this, the theist usually needs moral concepts such as love, justice, faithfulness, mercy, and wisdom to have intelligible content for us. But once those concepts have content, critics ask whether we are evaluating alleged divine commands by a moral understanding that is not itself produced by command. The theist need not concede that this moral understanding is independent of God in a metaphysical sense; but the theist does need to explain how the concepts are intelligible without becoming a disguised external standard.

The divine command theorist can answer that our moral concepts participate in or reflect the divine nature rather than stand above it. That is a coherent metaphysical proposal, but it is no longer a quick argument that atheists cannot have objective morality. It is a full theory of value, and it must be defended as such.

Second, the distinction between God's nature and God's commands helps with goodness, but it may not fully solve the problem of obligation. Suppose goodness is grounded in God's nature. Why does that generate duties for human beings? Adams and others answer that obligations arise within a relationship between God and creatures, something like the authority of a perfectly loving creator. Critics can accept, at least for the sake of argument, that such a being would be admirable and trustworthy while still asking why commands from that being create moral requirements rather than excellent advice, reasons for action, or prudential reasons to comply. Authority is not the same as goodness, and the move from perfect goodness to universal obligation needs argument.

Third, the atrocity concern remains at the level of human practice. Even if, in theory, God could never command evil, religious communities still must decide which alleged commands are authentic and how they should be interpreted. The modified theory may say, "Any command to commit genuine atrocity cannot be from God." That is an important safeguard. But it also means believers must use moral judgement in assessing alleged revelation or tradition. In practice, moral reasoning cannot be bypassed by command-language.

The Canaanite test case

The killing of the Canaanites is often used because it places pressure on the theory at its most difficult point. Many secular moral frameworks regard the intentional killing of non-combatants, children, or entire populations as intrinsically wrong or at least almost impossible to justify. If a theist says such an act was right solely because God commanded it, the critic will see that as confirmation that divine command theory can override basic moral constraints.

A careful theist has several possible replies. One may deny that the texts in question should be read as literal total extermination. Another may argue that the case is an exceptional act of divine judgement, not a model for human policy. Another may say that no private claim, charismatic leader, or ordinary act of interpretation could supply the kind of public and unmistakable authorization required even to begin considering such a case. Another may reject the defence entirely and say that any interpretation making God command atrocity should be abandoned.

These replies are not equal, and each carries costs. But the important point for internal critique is this: the divine command theorist who wants to avoid "might makes right" should not treat "God commanded it" as a magic phrase that dissolves all moral horror. The more responsible route is to say that God's perfect goodness constrains what can count as a divine command in the first place, and that human claims about such commands must be morally and interpretively scrutinized. That protects the theory from arbitrary power, but it also concedes that moral intelligibility matters and that command-language cannot replace moral reasoning.

What this argument does and does not establish

The Euthyphro-style argument establishes something significant: a crude divine command theory is inadequate. If morality is grounded in bare command, without reference to divine goodness, wisdom, or love, then the charge of arbitrariness is powerful. Such a view struggles to distinguish moral authority from irresistible force.

It also establishes a practical warning: appeals to divine command can be morally dangerous when they discourage scrutiny, compassion, and accountability. Any community that says obedience alone is enough has made itself vulnerable to abuse.

But the argument does not establish that theism cannot ground objective morality. Modified divine command theory, natural law theory, and theistic Platonism are all more sophisticated options. They may be false, but they are not refuted by the simple dilemma unless further argument is supplied. The best theistic accounts do not say "right reduces to might"; they argue that moral reality is rooted in the character, purposes, or necessary goodness of God. Whether that argument succeeds depends on further work about the nature of goodness, authority, and moral knowledge.

Nor does the argument establish secular moral realism. Atheists can be moral realists, and philosophers such as Erik Wielenberg, Derek Parfit, David Enoch, and Russ Shafer-Landau have defended non-theistic accounts of objective morality. But showing that one theistic grounding fails would not by itself show that a secular grounding succeeds. Those theories face their own questions about normativity, moral knowledge, and why moral facts have authority over us.

The fair conclusion is narrower and stronger: theism does not secure objective morality merely by invoking command. If God's commands are detached from moral character, the view collapses toward arbitrariness. If they are tied to divine goodness, then the theist has escaped the crudest Euthyphro dilemma, but must explain what divine goodness means, how it grounds obligation, and how alleged commands are morally discerned. That is a serious philosophical project, not a slogan.