Why Would a Good God Allow Bad Things? (And Other Puzzles from Pierre Bayle)

Imagine you’re walking home from school and you see something strange in the sky—a bright streak of light, a comet. Your grandmother says it’s a sign from God, a warning that something terrible is going to happen. Your friend’s older sister says it’s just a chunk of ice and rock burning up in the atmosphere. Who’s right?

Now imagine a harder question. You’re reading the news, or you’re thinking about something that happened in your own life—someone got hurt, or something unfair happened, or people did cruel things to each other. And you wonder: if there’s a God who is all-powerful and all-good, why does any of this happen? Why isn’t the world better than it is?

These are the kinds of questions that obsessed a French philosopher named Pierre Bayle, who lived in the 1600s. Bayle wrote millions of words about these puzzles, and he made a lot of people very angry because he kept saying things like: “Actually, nobody has a good answer to this.” He didn’t mean that in a dismissive way. He meant it as a serious philosophical problem—one that he thought revealed something important about the limits of human thinking.

Can Atheists Be Good People?

Let’s start with a simpler puzzle Bayle raised. In his day, almost everyone assumed that you needed to believe in God in order to be a moral person. Without religion, they thought, people would just do whatever they wanted—steal, lie, hurt others. Religion was like a leash that kept people from being their worst selves.

Bayle thought this was superstitious nonsense. He pointed out that there were plenty of atheists throughout history who were perfectly decent people—kind, honest, brave, generous. And there were plenty of religious people who did terrible things. So belief in God wasn’t what made people good or bad.

What actually drives people’s behavior, Bayle argued, is not their beliefs or principles. It’s their habits, their upbringing, their personality, and their emotions. You don’t become generous because you believe in generosity. You become generous because you were raised that way, or because it’s become a habit, or because you’re naturally that kind of person. A religious person can be cruel, and an atheist can be kind, and neither outcome has much to do with what they believe about God.

Bayle went even further. He thought a society made up entirely of atheists could actually be more peaceful than a religious society. Why? Because religion has a nasty habit of making people fight each other. When people think they’re fighting for God, or defending their faith, they become incredibly stubborn and violent. Atheists, by contrast, don’t have any religious reasons to go to war. They’d just get along, provided they were raised well.

This was a radical idea in the 1680s. People accused Bayle of being an atheist himself just for suggesting it. But Bayle insisted he was just pointing out an obvious historical fact: atheists can be virtuous, and religious people can be vicious. The evidence was right there.

The Right to Be Wrong

Bayle’s thoughts about atheism connected to a deeper question: should people be forced to change their religion? In Bayle’s time, French Catholics were persecuting French Protestants (like Bayle’s own family). People were imprisoned, tortured, exiled, and killed because they believed the “wrong” things about God.

Bayle argued against this persecution with a clever argument. Here’s the basic idea:

Imagine you’re a servant left in charge of a house while the master is away. The master gives you one rule: let anyone into the house who shows you a certificate with a special seal on it, and turn away anyone who doesn’t have one. Simple enough.

But what happens when the master’s own son shows up without the certificate? Or what happens when a clever thief shows up with a forged certificate that looks exactly like the real thing?

Bayle’s point is that you, the servant, have to use your own judgment. You can’t ask the master, because he’s not there. You have to decide, based on the best evidence you have, whether the certificate is real or fake. And if you honestly believe a fake certificate is real, you have to let the thief in. If you honestly believe the real son’s letter is fake, you have to turn him away. It would be wrong—a betrayal of the master’s trust—to do the opposite of what you genuinely believe is right.

This is what Bayle calls “conscience”—your honest judgment about what’s true and right. He argues that everyone has the right and duty to follow their conscience, even if their conscience is wrong. Because you can’t do any better than your best judgment. And nobody else can do your judging for you.

This leads to a startling conclusion: if a sincere Catholic honestly believes God wants them to persecute Protestants, then they must persecute—according to their own conscience. But if a sincere Protestant honestly believes God wants them to resist, they must resist. Both are following their conscience. Both are doing what they think is right.

Now here’s the problem Bayle created for himself. If everyone has a right and duty to follow their conscience, and some people’s consciences tell them to persecute others, then you get a moral standoff. Both sides think they’re doing the right thing. How do you avoid a never-ending war?

The Puzzle of the Sincere Persecutor

Bayle’s solution was to argue that persecution can never really be a matter of sincere conscience. He said that if you honestly examine it, persecution is obviously wrong—it’s not the kind of thing a reasonable person could genuinely believe is good.

Why? Because the goal of persecution is supposed to be getting people to love God properly. But you can’t make someone love God by threatening them, imprisoning them, or torturing them. That’s more likely to make them hate God. So persecutors are kidding themselves. They’re not being honest about what they’re actually doing.

This argument is clever, but many philosophers think it fails. What if there’s someone who has genuinely thought about it and sincerely believes that persecution is God’s will? Then Bayle’s own argument about conscience seems to say that this sincere persecutor must persecute. But Bayle also says persecution is always wrong. This is called the “Sincere Persecutor Paradox”—a puzzle that philosophers still argue about today.

The Big One: Why Does Evil Exist?

Bayle’s most famous and controversial work was about the problem of evil. If God is all-powerful, all-knowing, and all-good, why is the world full of suffering, injustice, and cruelty?

Bayle imagined a debate between two philosophers. One is a monotheist named Melissus, who believes in one all-good God. The other is a dualist named Zoroaster, who believes there are two gods—one good and one evil. The good god creates everything good; the evil god creates everything bad.

When they argue about which theory makes more sense in theory, Melissus wins easily. One perfect God is simpler, more elegant, more reasonable. But when they argue about which theory better explains what we actually see in the world, Zoroaster wins. Look around: there’s good stuff and bad stuff. The simplest explanation is that there’s a good source and a bad source. Monotheism has to do all sorts of mental gymnastics to explain why a single good God would allow so much evil.

Bayle then went through all the standard Christian explanations for evil:

The “Fall of Adam and Eve” explanation: Adam and Eve sinned, and that’s why we have evil. But Bayle asked: how could Adam and Eve, who were created perfect, ever choose to sin in the first place? If they were really perfect, they wouldn’t have had the desire or capacity to do wrong.

The “free will” explanation: God gave humans free will, and they misuse it. But Bayle responded: if God knew beforehand that people would misuse their freedom to cause terrible suffering, why did he give it to them anyway? Imagine giving a criminal a knife when you know they’ll use it to kill someone. You’re partly responsible for that murder.

The “felix culpa” (happy fault) explanation: God allowed evil so he could redeem humanity through Jesus, which is actually a greater good. Bayle compared this to a father who lets his child break an arm just so he can show off his skill at setting bones. Or a king who lets a rebellion start just so he can demonstrate his power by crushing it. Does that sound like an infinitely good being?

Bayle’s conclusion was stark: human reason cannot solve the problem of evil. Every attempt to explain it fails. The only option, he said, is to accept it as a mystery—like the Trinity or the Incarnation—and just believe it by faith, without trying to understand it rationally.

Many people at the time thought this was a cover for atheism. They said Bayle was really trying to destroy faith in God by showing that reason can’t defend it. Bayle insisted he was sincere—he really did believe in God, even though he couldn’t rationally explain why evil exists. But the debate about what Bayle really believed has never been settled.

The Bayle Enigma

Here’s the weird thing about Pierre Bayle: nobody can agree on what he actually thought. Depending on which of his writings you read, and how you read them, you could conclude that he was:

An atheist trying to destroy religion
A Christian trying to defend faith against rational attacks
A skeptic who didn’t believe anything could be known for certain
A rationalist who believed in the power of reason but thought it had limits

This is called the “Bayle Enigma.” The problem is that Bayle wrote in a very strange style. His most famous book, the Historical and Critical Dictionary, is basically a giant encyclopedia with tiny factual articles at the top of each page and enormous footnotes at the bottom. The footnotes contain the real philosophical action—arguments, objections, dialogues, jokes, and sometimes stories that have nothing to do with the main article.

In these footnotes, Bayle often presents both sides of an argument without clearly saying which side he agrees with. He quotes other authors extensively. He invents characters who debate each other. Sometimes it seems like he’s arguing for a position, but it turns out the character making the argument is someone he disagrees with.

So readers have to figure out: when is Bayle speaking in his own voice? When is he just presenting someone else’s view for the sake of argument? When is he being ironic? These questions have no clear answers, which is why three centuries later, scholars still argue about what Bayle really believed.

This might sound frustrating. But maybe that’s the point. Bayle thought that keeping an open mind—not committing yourself to any system, not pretending to have answers you don’t have—was a kind of intellectual integrity. He wanted to present arguments on all sides and let readers make up their own minds. If that means nobody can pin him down, maybe that’s exactly what he intended.

Why This Still Matters

The debates Bayle started are still alive today. People still argue about whether atheists can be moral. People still argue about whether religious persecution is ever justified. And people still argue about the problem of evil—it remains one of the most powerful arguments against the existence of God, and also one of the most difficult challenges for believers to face.

Bayle’s deepest insight might be that some questions don’t have satisfying answers—and that’s okay. What matters is being honest about what you know and what you don’t know, and not pretending to have solutions you don’t actually have.

Key Terms

Term	What it does in this debate
Conscience	Your honest judgment about what is true and right, which Bayle argues you have a duty to follow even if it’s wrong
Problem of evil	The puzzle of how a perfectly good, all-powerful God could allow suffering and injustice to exist
Theodicy	An attempt to explain why God allows evil—Bayle thought all such attempts fail
Sincere Persecutor Paradox	The problem that if everyone must follow their conscience, then even persecutors must do what they think is right, which seems to justify persecution
Conscience	Your honest judgment about what is true and right, which Bayle argues you have a duty to follow even if you’re mistaken

Key People

Pierre Bayle (1647–1706): A French philosopher who had to flee his country because of his ideas about religious tolerance. He spent most of his life writing a massive encyclopedia full of footnotes that argued about God, evil, morality, and skepticism. No one can agree on what he actually believed.
Pierre Jurieu: A Protestant theologian who was Bayle’s friend and then became his bitter enemy. He accused Bayle of atheism because of his arguments about virtuous atheists and the problem of evil.

Things to Think About

Bayle says you should always follow your conscience, even if it’s wrong. But what if someone’s conscience tells them to do something terrible—like hurt innocent people? Is there a limit to how much we should respect someone’s sincerely held beliefs?
Bayle thought atheists could be just as moral as religious people. Do you agree? What do you think actually makes people kind, honest, or fair? Is it their beliefs, or something else?
If you were God and wanted to create a good world, would you allow evil to exist? Is there any amount of suffering that could be justified by a greater good? Where would you draw the line?
Bayle wrote in a style that made it impossible to know what he really believed. Is that a good thing or a bad thing for a philosopher? Should writers be clear about their views, or is it okay to let readers figure it out for themselves?

Where This Shows Up

Every time someone says “you can’t be good without God” — Bayle’s arguments against this idea are still used in debates about religion and morality.
Discussions about freedom of speech and religion — Bayle’s ideas about conscience and tolerance are foundational to modern arguments about why governments shouldn’t force people to believe certain things.
When people suffer and ask “why me?” — The problem of evil that Bayle struggled with is the same one people face in hospitals, after natural disasters, or when terrible things happen to good people.
Online arguments about what someone “really believes” — Bayle’s habit of writing in ways that can’t be pinned down anticipates modern questions about irony, trolling, and how to tell when someone is being sincere.