In brief

The moral argument asks whether duties and values are objective and what could ground them. Theistic versions connect moral reality to God; critics argue that morality can be grounded in reason, human flourishing, or natural facts, and that divine-command accounts face dilemmas.

A moral argument often proceeds from the apparent objectivity of at least some moral obligations to the claim that a transcendent ground is needed. Defenders say a personal source explains why duties bind persons and why human worth is non-negotiable. Critics distinguish moral ontology from moral knowledge and propose secular realist, constructivist, or consequentialist accounts. They also ask whether commands make actions good or merely report a prior standard. Even a successful moral argument would need additional premises to establish the God of Christian revelation.

The evidence in view

What the sources show

01

Historical observation

People commonly experience some moral judgments as obligations that are not reduced to personal preference. [1][2]

A report about moral experience and ordinary moral discourse.

Where this gets uncertain: Experience does not settle the metaphysical status of moral judgments.

02

Argument

If objective moral obligations exist, a theistic account may explain their authority by grounding them in a good personal reality. [1][3]

A conditional metaethical argument.

03

Inference

The moral argument does not by itself establish the historical claims or distinctive doctrines of Christianity. [2][3]

The argument's conclusion relative to Christian theology.

Where this gets uncertain: Theistic philosophers disagree over how much cumulative support it provides.

Where people land

Disputed

Philosophers disagree about moral objectivity and whether theism offers the best explanation; the argument is a live debate, not a settled result.

christian

Grounds value and obligation in a theistic account of goodness. [1][3]

skeptical

Defends non-theistic accounts of objective morality or challenges the explanatory move. [2]

The strongest pushback

Questions this view has to answer

Objective morality may not require God [2]

Non-theistic moral realism or rational constructivism may ground normativity without a divine person.

What it explains: It preserves moral objectivity while rejecting the theistic explanation.

A response

Theistic defenders argue that non-theistic realism leaves normativity unexplained, while critics reply that explanatory demand is not a proof and that theistic accounts face their own questions. [1][2]

What remains open: There is no agreed metaethical starting point from which to rank explanations.

The Euthyphro dilemma [1][2]

If actions are good because God commands them, morality can seem arbitrary; if God commands them because they are good, goodness appears independent of God.

What it explains: It tests whether divine command supplies a genuine ground rather than a label.

A response

Some theists ground goodness in God's necessary nature rather than arbitrary commands; this avoids one formulation of the dilemma but introduces questions about knowing that nature and its normativity. [1][3]

What remains open: The nature-based account remains disputed and does not bridge to Christianity alone.

Sources

Read the material behind the page

These works support specific parts of the record. The numbered references in the text bring you back here.

  1. 1

    Robert Merrihew Adams. Finite and Infinite Goods, Oxford University Press (1999).

    Major philosophical account connecting moral obligation, value, and theistic commitments.

  2. 2

    Erik J. Wielenberg. Robust Ethics, Oxford University Press (2014).

    Develops a non-theistic account of objective moral facts and addresses theistic arguments.

  3. 3

    William Lane Craig and Paul Copan. The New Atheist Guide to the Old Testament, Baker Books (2009).

    Representative popular-level defense of a moral argument and its Christian context.