Why Does Evil Exist? A Comparative Religious Answer

Jewish thought doesn't offer a single, tidy answer to why evil exists — and that's actually part of its intellectual honesty. The Hebrew Bible (Tanakh) approaches evil from multiple angles: moral, cosmic, and existential.

One of the most striking observations comes from Ecclesiastes, which bluntly states that "the heart of the sons of men is full of evil, and madness is in their heart while they live" Ecclesiastes 9:3. This isn't a metaphysical claim about a devil — it's a frank anthropological one. Evil is deeply embedded in human nature and human society.

Yet the Book of Job pushes back on simplistic causation. Job 5:6 insists that evil does not grow out of the soil, nor does mischief spring from the ground Job 5:6 — meaning evil isn't some natural, inevitable force. It requires a moral agent. This tension is central to Jewish theodicy.

Proverbs reinforces the moral-agency angle: "Evil comes to someone who is bent on it" Proverbs 11:27, suggesting that evil is often a consequence of deliberate orientation toward wrongdoing rather than random cosmic fate.

Classical rabbinic tradition, particularly the Talmudic concept of the yetzer ha-ra (evil inclination), holds that humans are born with competing drives — toward good and toward self-serving impulse. Rabbi Joseph B. Soloveitchik (20th century) argued that this internal struggle is precisely what makes human moral life meaningful. Evil exists, in part, because genuine freedom requires the real possibility of choosing it.

Medieval Jewish philosopher Maimonides (12th century) argued in the Guide for the Perplexed that most evil is privation — the absence of good — rather than a positive force. Natural evils arise from the limitations of matter; moral evils arise from human ignorance and vice. God didn't create evil as a thing; rather, finitude and freedom make it possible.

Christianity inherits the Hebrew Bible's wrestling with evil and adds a distinctive theological layer: the narrative of the Fall, the cosmic rebellion of Satan, and ultimately the redemptive suffering of Christ.

Ecclesiastes, shared with Judaism, remains canonical for Christians too. Its observation that "the heart of the sons of men is full of evil, and madness is in their heart while they live" Ecclesiastes 9:3 is read by Christian theologians as evidence of what Augustine of Hippo (4th–5th century) called original sin — a corruption of human nature inherited from Adam and Eve's disobedience in Eden (Genesis 3).

The classic Christian theodicy, developed most rigorously by Augustine and later by Alvin Plantinga in his 1974 The Nature of Necessity, is the Free Will Defense: God created beings capable of genuine love, and genuine love requires genuine freedom, which entails the real possibility of choosing evil. Evil, on this view, isn't something God authored but something creatures introduced through misuse of freedom.

Ecclesiastes also notes that "there is one event unto all" — death and suffering come to everyone Ecclesiastes 9:3 — a reality Christian theology addresses through the resurrection: suffering and death are real, but not the final word.

There's also a strand of Christian thought, particularly in the tradition of Irenaeus of Lyon (2nd century), that sees evil and suffering as necessary for soul-making — moral and spiritual growth that couldn't occur in a pain-free world. John Hick (20th century) developed this into a full theodicy. Disagreement between Augustinian and Irenaean approaches remains lively in contemporary Christian philosophy of religion.

Proverbs' warning that "evil comes to someone who is bent on it" Proverbs 11:27 resonates with the Christian emphasis on repentance and conversion — the idea that turning away from evil is always possible through grace.

Islamic theology approaches the existence of evil with a strong emphasis on divine sovereignty and the concept of ibtila — trial or testing. Evil isn't an accident or a flaw in creation; it's part of Allah's purposeful design for human moral development.

Surah Al-Falaq (113:2) famously calls on believers to seek refuge in Allah "from the evil of that which He created" Quran 113:2. This is a remarkable verse: it acknowledges that evil things exist within creation, while simultaneously directing the believer toward Allah as the only true protection. Classical commentators like Ibn Kathir (14th century) interpreted this broadly — covering natural harms, human malice, and spiritual threats alike.

The Quran is also pointed about moral evil as a human choice. Surah Al-Baqarah 2:90 states: "Evil is that for which they sell their souls: that they should disbelieve in that which Allah hath revealed" Quran 2:90. Here evil is explicitly tied to ingratitude, rejection of divine guidance, and self-corruption — a transaction in which humans trade their spiritual integrity for worldly or ego-driven ends.

Surah Al-Ankabut 29:4 reinforces that evildoers are not beyond divine reckoning: "Or do those who do ill-deeds imagine that they can outstrip Us? Evil (for them) is that which they decide" Quran 29:4. Evil, in this framing, is ultimately self-defeating.

Islamic theology distinguishes between sharr (evil/harm) and fasad (corruption/disorder). Scholars like Ibn Taymiyyah (13th–14th century) argued that Allah permits evil not because He is indifferent but because the wisdom behind it — building patience, faith, and justice — may be beyond immediate human comprehension. The Ash'ari school of theology, dominant in Sunni Islam, holds that Allah's will is the ultimate cause of all things, including evil, though humans remain morally responsible for their choices. This creates a genuine theological tension that Muslim scholars have debated for centuries.

In the Tanakh, evil is observed as a pervasive reality “under the sun,” not as a metaphysical abstraction but as something encountered in human life and society Ecclesiastes 6:1. Qohelet notes “one event unto all,” and that human hearts are “full of evil,” locating the problem within human intention and mortality’s horizon Ecclesiastes 9:3. He also sees evil emerging through political misrule—errors that proceed from rulers—showing how structures can magnify harm Ecclesiastes 10:5. Wisdom literature adds that evil does not just erupt from nature itself, challenging the idea that it springs automatically from the world’s fabric Job 5:6. Instead, evil often follows those bent on it, emphasizing responsibility and moral direction Proverbs 11:27. In turmoil, the Psalmist names the nearness of evil and fear, acknowledging its experiential weight while turning to God Psalms 49:6.

The biblical witness received by Christians also speaks of evil as a common reality “under the sun,” marking life with trouble and injustice Ecclesiastes 6:1. Ecclesiastes observes that the same fate befalls everyone while the human heart is filled with evil, highlighting an inner moral distortion bound up with mortality Ecclesiastes 9:3. It further warns that misrule can yield public wrongs—an evil that proceeds “from before the ruler”—so social power can amplify harm Ecclesiastes 10:5. Proverbs adds a moral lawfulness: evil comes to those who pursue it, underscoring personal agency and consequences Proverbs 11:27. Job insists evil doesn’t simply sprout from the ground, pushing Christians to resist naturalizing evil as inevitable fate and to see it bound to human choices and a broken world rather than to creation’s soil itself Job 5:6.

The Qur’an presents evil as bound up with human choices and accountability before God: some “sell their souls” by disbelieving out of envy, incurring divine anger and disgrace, linking evil to willful rejection of guidance Quran 2:90. Those who do ill-deeds and think they can outstrip God are warned their decision is evil for them, stressing responsibility and the certainty of reckoning Quran 29:4. Believers seek refuge in God from the evil present within created things, acknowledging evil’s reality within creation while affirming God as the one to whom protection is sought Quran 113:2.