The moral argument claims that objective morality exists, and the best (or only) explanation for its existence is God. William Lane Craig has made it his signature move in debates, presenting it like this:
- If God does not exist, objective moral values and duties do not exist.
- Objective moral values and duties do exist.
- Therefore, God exists.
It sounds neat and airtight – but like most things that sound too neat, it unravels quickly.
Famous Voices
- Defenders: Immanuel Kant (though he argued morality points to God rather than proves Him), C. S. Lewis, William Lane Craig.
- Critics: Plato (Euthyphro dilemma), David Hume, J. L. Mackie, Bertrand Russell, Richard Dawkins, Louise Antony.
Problems with the Argument
1. The Euthyphro Dilemma
Plato demolished this centuries before Christianity. Are things good because God commands them, or does God command them because they are good? If the former, morality is arbitrary: God could declare genocide moral and compassion sinful, and believers would have to accept it. If the latter, then morality exists independently of God, and God is redundant. Craig tries to dodge this dilemma by saying God’s nature is “goodness itself,” but that’s just wordplay: defining God as the source of morality is not the same as proving it.
2. Objectivity ≠ Divinity
Theists smuggle in the assumption that “objective” means “authored by a deity.” But objectivity in ethics simply means “independent of individual opinion.” Secular moral realism, Kantian ethics, utilitarianism, and evolutionary explanations all provide frameworks for moral objectivity without needing a divine lawgiver. The existence of such accounts directly contradicts Craig’s premise.
3. But Do Objective Moral Values Even Exist?
Craig’s entire argument depends on premise two: that objective moral values actually exist. Yet this is hotly contested. Many philosophers argue morality is not objective in the same way that mathematics is. Morality could be intersubjective – a shared human project rooted in empathy, biology, and culture – rather than some cosmic law floating in the ether. The fact that moral codes vary so widely across time and culture undermines the claim that they are timeless and absolute. If premise two fails, the whole argument collapses.
4. Morality Without God
Ethical systems predate Christianity and appear across cultures untouched by the Bible. Confucianism, Buddhism, and Stoicism all developed robust moral philosophies without invoking Yahweh. Evolutionary psychology explains morality as an adaptation: cooperation and empathy make groups more likely to survive and we even see this in the animal kingdom among other social species. Far from requiring God, morality looks like a natural outgrowth of human existence.
5. The Problem of Disagreement
If God is the source of an objective moral law, why do believers disagree violently on what that law says? Christians have used the Bible both to justify and condemn slavery, colonialism, patriarchy, and discrimination. Craig insists God provides a clear moral compass, but history shows a fog of contradictions. Either God is a terrible communicator, or humans are making it up.
6. Morality Undercuts God
The Bible portrays God commanding genocide, slavery, and execution for trivial offenses. If God is “goodness itself,” then these atrocities must be considered good, which makes the concept of divine morality meaningless. If we recoil at these acts – and we do – it’s because we have independent moral reasoning that judges God’s supposed commands. Morality doesn’t prove God; it often condemns him.
7. Craig’s Smokescreen
Craig’s version of the moral argument works only if you grant his premises without question. He states morality cannot exist without God, then presents our shared moral intuitions as proof God is real. But this is simply begging the question. Secular explanations of morality exist and thrive, and Craig dismisses them not with refutations but with assertions.
Conclusion
The moral argument is emotionally persuasive but logically hollow. It survives not because it’s strong but because it flatters the believer: it says your deepest moral instincts are evidence of God’s hand. But this is smoke and mirrors. Not only can morality be explained without God, it’s not even clear that morality is truly “objective” in the sense theists assume. At best, morality is intersubjective: a shared human construction grounded in empathy, reason, and social living. Instead of proving God, the moral argument highlights how humans are capable of building ethical systems without divine help – and how, in many cases, our morality must be used to judge and reject the commands of scripture.