Philosophy

Theodicies: The Problem of Evil and the Reductionist Turn

Why suffering created one of philosophy’s oldest theological problems — and why TOV eventually changes the question

The problem of evil begins with an apparent contradiction. If God is all-powerful, God can prevent evil. If God is all-knowing, God knows when evil will occur. If God is perfectly good, God should wish to prevent unnecessary suffering. Yet suffering, cruelty, disease, catastrophe, and death plainly exist.

For more than two thousand years, philosophers and theologians have tried to explain how those propositions can coexist. The attempt to justify divine goodness in the face of evil is called theodicy, from the Greek theos (God) and dikē (justice). Gottfried Wilhelm Leibniz gave the subject its modern name in his Théodicée of 1710, but the problem is far older.

TOV begins by taking that problem seriously. It does not disappear merely because a naturalistic account of good and evil is available. Nor does reductionism prove that God does not exist. The important move comes later: after seeing what theodicy is trying to accomplish, TOV asks whether its own inquiry into good, evil, life, suffering, and human conduct actually requires a theological solution.

The Old Question

The dilemma is traditionally associated with Epicurus, although the familiar wording comes through later writers. David Hume famously restated “Epicurus’s old questions”: if God wishes to prevent evil but cannot, God is not omnipotent; if God can prevent evil but does not wish to, divine goodness is called into question; if God both can and wishes to prevent evil, why is there evil?

The argument has taken different forms. The logical problem of evil claims that the traditional attributes of God are logically incompatible with the existence of evil. The evidential problem of evil makes a more modest claim: the quantity, intensity, and apparently pointless distribution of suffering count as evidence against the existence of such a God, even if strict contradiction cannot be demonstrated.

This distinction becomes important because not every answer to the problem attempts the same thing. Some philosophers try to explain God’s actual reasons for allowing suffering. Others make the narrower case that God and evil could logically coexist.

What Is a Theodicy?

A theodicy attempts to give morally sufficient reasons why a perfectly good, omniscient, omnipotent God might permit the evils found in the world. It therefore takes on an ambitious burden. It is not enough to say that a reason might exist somewhere beyond our understanding. A full theodicy tries to identify the reason, or at least the kind of reason, that would justify divine permission of suffering.

Across Christian philosophy, several major approaches recur. They differ considerably, but each attempts to show that evil can exist within a world governed by a good God.

Augustine: Evil as Privation

Augustine’s solution begins by denying that evil is a substance competing with good. Everything that exists, insofar as it exists, is good because existence comes from God. Evil is a privation: a disorder, corruption, or absence of a good that ought to be present.

A diseased eye is not a new kind of substance called evil. It is an eye deprived of proper functioning. Moral evil likewise arises when a rational will turns away from a higher good toward a lower one in the wrong order. God therefore does not “create evil” in the same sense in which God creates beings.

The privation theory remains philosophically important because it changes the ontology of evil. Yet the original problem does not vanish. Even if evil is a defect rather than a substance, a perfectly powerful creator knowingly creates a world in which those defects, horrors, and sufferings occur.

Leibniz: The Best of All Possible Worlds

Leibniz gave the subject its name and one of its most ambitious answers. A perfect God, he argued, possesses perfect wisdom and goodness. God therefore knows every possible world and chooses the best world available. The existence of local evil does not by itself show that the world as a whole could have been better.

The idea is subtler than the caricature that “everything happens for the best.” Leibniz allows genuine physical and moral evil. His claim is global: a world from which one disturbing event were simply removed might require other changes that reduce the world’s overall order, richness, freedom, or perfection. Human beings are poorly positioned to calculate the consequences of altering one event in the total history of the universe.

The difficulty is equally obvious. This reasoning can explain almost anything after the fact. The greater and more apparently pointless the suffering, the harder it becomes for a finite observer to distinguish “necessary component of the best possible world” from an assertion protected from evidence by our inability to see the whole.

Hick: A World for Soul-Making

John Hick developed what he called an Irenaean or soul-making theodicy. Human beings, on this view, were not created morally complete and then merely damaged by a fall from perfection. They are unfinished creatures developing toward moral and spiritual maturity.

A world without danger, resistance, pain, moral choice, or consequences would provide little opportunity to develop courage, compassion, patience, responsibility, or self-sacrifice. The world's difficulty is therefore partly the environment in which character becomes possible.

The objection is proportionality. Some hardship clearly can produce growth. Other suffering overwhelms, deforms, or kills its subject. “Soul-making” is much easier to apply to adversity from which a person can learn than to torture, infant disease, mass starvation, animal suffering, or catastrophes that destroy the very person whose soul is supposedly being formed.

Plantinga: A Defense Is Not a Theodicy

The distinction matters

A theodicy tries to identify God’s morally sufficient reason for allowing evil. A defense has a narrower task: show that God and evil are not logically incompatible, even if we do not know God’s actual reason.

Alvin Plantinga’s famous Free Will Defense is therefore better classified as a defense than as a full theodicy. Plantinga argues, roughly, that it is possible that morally significant freedom has great value and that even an omnipotent God cannot cause a creature to make a genuinely free choice while simultaneously guaranteeing what that free choice will be.

If a logically possible world contains free creatures who sometimes choose wrongly, then the existence of an all-powerful, all-knowing, perfectly good God is not formally inconsistent with the existence of moral evil. Plantinga’s argument is widely credited with substantially weakening the strongest version of the logical problem of evil.

But logical compatibility is not the same as explanation. The defense does not tell us why a particular child suffers, why an earthquake kills thousands, why predation existed long before human moral agency, or why a world containing freedom requires the amount and intensity of suffering we observe. Those questions belong more naturally to the evidential problem of evil.

Natural Evil Makes the Problem Harder

Free will is most naturally invoked to explain moral evil: murder, torture, betrayal, cruelty, oppression, and other harms arising from intentional human action. It is much less direct as an explanation of natural evil: earthquakes, hurricanes, childhood cancers, congenital disease, parasitism, predation, drought, and other suffering not obviously produced by human choice.

The distinction exposes a recurring problem for theodicy. Explanations that work reasonably well for one class of suffering may not work for another. If freedom justifies moral risk, why must tectonic plates crush children? If stable natural laws are necessary for an intelligible world, why must those laws generate this much suffering? If hardship produces character, what is being formed in an animal that dies slowly from disease?

The questions do not prove that no answer exists. They show why theodicy persists. Each proposed answer tends to illuminate part of the problem while leaving another part exposed.

The Reductionist Turn

TOV Changes the Question

TOV does not solve the problem of theodicy. It sets the theological problem aside because its working definitions of good and evil do not require an answer to it.

Theodicy asks: Why would a good and powerful God permit this suffering?

TOV asks: What happened, what caused the suffering, was it necessary, and how can it be reduced?

This is a change in explanatory level, not a disproof of theology. God may exist or may not. A particular theodicy may succeed or fail. TOV's more limited claim is that we can investigate the material consequences of human conduct without first settling those questions.

Reductionism Is Not the Same as Physicalism

The word reductionism is sometimes used as though it meant that only atoms are real or that every higher-level description is meaningless. That is not the method required here. Reductionism can simply mean trying to understand a complicated phenomenon by identifying simpler constituent processes and principles.

Physicalism, by contrast, is the ontological claim that reality is fundamentally physical. One may adopt reductionist methods in biology, psychology, or ethics without pretending that every useful higher-level description should be discarded.

TOV's move is best understood as methodological and naturalistic. Instead of beginning with a metaphysical entity called Evil or with a divine command whose purpose must be inferred, it begins with observable life, conscious suffering, agency, cooperation, and destruction. It then asks whether much of our moral vocabulary can be built upward from those more elementary facts and values.

A Normative Premise Must Still Be Admitted

Reductionism does not magically turn biology into morality. The fact that organisms struggle to survive does not logically prove that survival is good. To move from description to moral evaluation, a value judgment has to enter somewhere.

TOV makes that judgment openly: life and the conditions that allow conscious life to flourish are preferable to their unnecessary destruction, and unnecessary suffering is something we have reason to reduce. Once that premise is stated rather than hidden, the rest of the inquiry becomes more tractable.

This avoids pretending that an “ought” has been discovered in a molecule. It also avoids multiplying moral entities unnecessarily. We can ask whether an ideology kills, whether an institution reduces coercion, whether an action destroys trust, whether a policy predictably increases needless suffering, and whether a society gives people the practical opportunity to live and flourish.

Those judgments remain disputable. The word unnecessary is particularly difficult. War, punishment, surgery, self-defense, predation, and competition all involve harms that may sometimes be unavoidable or justified. Reductionism does not eliminate moral argument. It moves the argument toward consequences, necessity, proportionality, evidence, and competing forms of life.

What Reductionism Removes — and What It Does Not

The reductionist turn removes one requirement from TOV's immediate inquiry: before deciding whether an act destroys life or causes unnecessary suffering, we do not have to know why God permitted it.

It does not establish that God is unreal. It does not prove that Augustine, Leibniz, Hick, Plantinga, or later philosophers of religion are mistaken about everything. It does not prove that religious morality has no value. And it does not convert every moral question into an easy calculation.

It does something narrower and, for TOV, more useful. It allows the site to proceed from the observable world outward. Human beings are conscious organisms capable of pain, pleasure, attachment, foresight, cooperation, language, violence, and imagination. We create institutions and ideologies. Those creations have consequences in the physical world. Some sustain life. Some destroy it. Some reduce suffering. Some multiply it.

At that level, evil no longer has to be an invisible substance or supernatural force. A genocidal idea begins in consciousness, becomes language, becomes organization, becomes policy, and eventually becomes bodies destroyed in the material world. The idea is intangible; its consequences are not.

Theodicy Remains a Philosophical Problem

The great theodicies are not discarded because they are foolish. They survive because each identifies something important: Augustine sees that evil may be better understood as corruption than as an independent substance; free-will approaches recognize the moral importance of agency; Hick recognizes that adversity can shape character; Leibniz reminds us that judging one event without knowing its systemic consequences can be intellectually hazardous; Plantinga shows the difference between contradiction and explanation.

None of those insights requires TOV to settle the ultimate theological question. The problem of evil remains a live problem for anyone who affirms a perfectly powerful, perfectly knowing, perfectly good God. For those who do not begin from that premise, the problem changes form. Suffering still exists, but the question is no longer why God permits it. The questions become causal and moral: why did it happen, who or what caused it, could it have been prevented, was it necessary, and what should conscious beings do about it?

Conclusion

Theodicy begins with one of humanity's deepest attempts to reconcile experience with belief. The world contains beauty, life, cooperation, and love. It also contains cruelty, disease, catastrophe, predation, and death. Philosophers have spent centuries trying to explain how both can exist under a perfectly good God.

TOV does not claim to finish that argument. It changes its own task.

Once good is approached through the conditions that sustain life and reduce unnecessary suffering, and evil through unnecessary destruction and the ideas that cause it, the investigation can proceed without first knowing the intentions of a deity. That is the beginning of TOV's reductionism: not a claim that every mystery has been solved, but a decision to begin with fewer assumptions and with consequences that can be observed.

Selected Sources and Further Reading

• Stanford Encyclopedia of Philosophy, “The Problem of Evil” — distinguishes logical and evidential arguments, defenses, and theodicies.
• Stanford Encyclopedia of Philosophy, “Theodicies” — contemporary philosophical treatment of attempts to justify divine permission of suffering.
• Stanford Encyclopedia of Philosophy, “Leibniz on the Problem of Evil” — Leibniz and the best-of-all-possible-worlds argument.
• Internet Encyclopedia of Philosophy, “The Logical Problem of Evil” — Plantinga's Free Will Defense and the logical problem.
• Internet Encyclopedia of Philosophy, “John Hick” — Hick's Irenaean or soul-making approach.
• About TOV — TOV's reductionist, life-centered working definition of good.