Ethics: The Problem of Evil

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Ethics: The Problem of Evil발음듣기

(intro music) My name is Sally Haslanger, and I'm a professor of philosophy at MIT.발음듣기

Today, we're going to discuss an argument in favor of atheism, in favor of the belief that God doesn't exist.발음듣기

Let's start with some definitions. "Theism" - that's "the belief that God exists."발음듣기

So, "atheism": "the belief that God doesn't exist."발음듣기

Rational theism is one form of theism.발음듣기

It's the belief that there are evidential reasons to believe that God exists.발음듣기

Now, arational theism is the belief in God without evidence.발음듣기

There are plenty of people who are arational theists, because they believe in God based on faith.발음듣기

Faith is often thought to be believing something in spite of the fact that you don't have evidence for it, and it's completely common for people to believe things without evidence, right?발음듣기

We believe things all the time based on wishful thinking.발음듣기

We believe it because it's just in the air, or it's convenient for us to believe it.발음듣기

It makes us happy for us to believe it.발음듣기

All those sorts of things. But we're talking here about evidence, where "evidence" is "some information "that lends credibility to the claim, "in the sense that it's more likely to be true "if you have the evidence."발음듣기

Okay, so arational theism, as I said, is a common position, but we're not really gonna talk very much about it today.발음듣기

Irrational theism is the belief in God in spite of evidential reasons supporting atheism.발음듣기

Notice that this is quite different from arational theism.발음듣기

The belief in God without evidence, as mentioned, could be just on the basis of a lack of evidence.발음듣기

But irrational theism is when you hold belief in God, that is, when you hold theism, but there are clear supporting reasons for the opposing view, that is, for atheism.발음듣기

Now, that's problematic, and we're gonna look a little bit further into why it's problematic.발음듣기

Let's move on to a few more definitions so that we're clear what we're talking about.발음듣기

Contradiction - what is a contradiction?발음듣기

A contradiction is when you have a set of beliefs that are not possibly true together.발음듣기

So a set of beliefs is contradictory if and only if it's not possible for all of them to be true.발음듣기

Here's a simple example: "Today is Monday.발음듣기

It's not the case that today is Monday."발음듣기

Those can't both be true together.발음듣기

Now, we're making an assumption: mainly, that we're talking about right here right now.발음듣기

We're not talking about something on the other side of the dateline.발음듣기

Considering "today is Monday," and "it's not today is Monday," that's a contradiction.발음듣기

Both of them can't be true.발음듣기

So if you believe both of them, then you're believing a contradiction.발음듣기

Now, it's not necessarily the case that a contradiction needs to involve only two statements.발음듣기

It can involve three statements. So "all birds can fly," "penguins are birds," "penguins can't fly."발음듣기

Not all of them can be true together, right?발음듣기

If you hold what it is to fly stable, if you hold what it is to be a bird stable, then you can't hold all these together and have just true beliefs.발음듣기

One of them has got to be false.발음듣기

Now you could say, "Well, maybe it's not the case that all birds can fly," or, "Maybe it's not the case that all penguins are birds," or maybe you could come up with a modification of what it is to fly so that penguins can fly.발음듣기

They're really good underwater, for example.발음듣기

You watch them under water, they look like they're flying.발음듣기

But that's not really flying. So you can't hold all of these beliefs.발음듣기

You have to figure out which one you're going to give up.발음듣기

Likewise, "today is Monday" and "it's not the case that today is Monday" - you need to give one up.발음듣기

Okay, now why do you have to give one up?발음듣기

Some people say, "Wait, we believe in contradictions all the time.발음듣기

It's just not obvious that we believe in contradictions.발음듣기

Well, that's true. We probably do have contradictory beliefs, but it's not good to have contradictory beliefs.발음듣기

We want to get rid of our contradictory beliefs.발음듣기

Now there are a couple of reasons why.발음듣기

First of all, it's really good to have true beliefs.발음듣기

You don't want to go around the world having false beliefs, cause it gets you into trouble.발음듣기

So if I believe that there's no wall here, and I go walking into the wall, then that's not so good.발음듣기

False beliefs can get you into trouble in that way.발음듣기

They can lead you into problematic circumstances that you'd probably best not be in.발음듣기

So holding beliefs that are false is problematic, and if you hold contradictory beliefs, you know one of them has got to be false, and that's bad.발음듣기

Another thing is coherent action. Having contradictory beliefs makes it difficult to act coherently.발음듣기

Look at this one: "Today is Monday, and it's not the case that today is Monday."발음듣기

Suppose you have a dentist appointment on Monday.발음듣기

What do you do? Do you go or not? You both believe that it is and it isn't Monday, so what are you gonna do?발음듣기

It's hard to act coherently and act in a sensible way to fulfill your obligations, etcetera.발음듣기

Since one of the beliefs you hold has got to be false, and you can't act on two contradictory beliefs, you can't really act coherently.발음듣기

So we're talking about whether God exists, and evidence for and against the existence of God.발음듣기

Now, there are many different conceptions of God or gods.발음듣기

I'm not trying to adjudicate what's the right or best conception of God.발음듣기

But there's a particular standard definition in the West, that God is an all-perfect being, a being at least who has these three features: a god is all-knowing (which is to be omniscient), all-powerful (which is to be omnipotent), and to be wholly good (or omnibenevolent).발음듣기

So this being is perfect, is omniscient, omnipotent, and wholly good, (or omnibenevolent).발음듣기

We're gonna call the combination of these features "OOO" ("O-O-O") Because they're pretty good ooo features.발음듣기

Let's go ahead and now look at the argument that suggests that atheism is the rational view to hold, the one that there's the greatest evidence to believe.발음듣기

Here's the first premise: if God exists, he, she, or it would be OOO.발음듣기

Now I use "he, she, or it" because, of course, I don't know whether there's a God, and if there is, whether it's a he, she, or it, or at least for the purposes of the discussion, we're not gonna assume anything like that.발음듣기

Okay, so that's the first premise.발음듣기

Second: if an OOO god exits, there would be no evil.발음듣기

Well, why's that? Well, if a god were all-knowing, then that god would know when evil was going to occur (or that it occurred), would have the power to make it not occur, and is wholly good, so would also have the motivation to make it not occur.발음듣기

So this combination of omniscience, omnipotence, and omnibenevolence suggests that if a god were truly OOO, there would be no evil.발음듣기

We assume for the purposes of argument that God exists.발음듣기

And we conclude, then, there is no evil.발음듣기

So if God exists, he, she, or it would be OOO.발음듣기

If an OOO god exists, there would be no evil.발음듣기

God exists, so there is no evil.발음듣기

The problem is, there is evil.발음듣기

Well, at least, it seems there's evil.발음듣기

That might be one of the questions that comes up when we consider objections to the argument.발음듣기

It appears, certainly appears, that there's evil: lynching, terrorism, the death of innocent babies.발음듣기

So for the moment, we're gonna say there is evil.발음듣기

But look: "there is no evil," "there is evil" - this is a contradiction.발음듣기

And so we have to reject one of these premises.발음듣기

Well, this one, that God is OOO, that one is hard to reject because that's just how we've defined what God is.발음듣기

This one - it seems straightforward.발음듣기

And so once we assume God exists, and we assume that there is evil in the world, which is hard to deny, we get a contradiction.발음듣기

So we have to reject something.발음듣기

And so the thing that's most likely to be false, according to the argument, is number (3), that God exists.발음듣기

So we conclude that God does not exist.발음듣기

Now this argument is a little bit truncated, as any argument is.발음듣기

It relies on two further assumptions.발음듣기

First, a wholly good thing always eliminates evil as far as it can.발음듣기

And second, that there are no limits to what an omnipotent thing can do.발음듣기

But these just seem to be part of the definition of all-knowing, all-powerful, and wholly good.발음듣기

It's just true by definition. So here's a way to think about it.발음듣기

If we assume a certain kind of God, an OOO God, and we really take seriously the perfection of that God (all-knowing, all-powerful, omnibenevolent,) then once we assume that kind of God, and that there exists some evil in the world, then we've got a contradiction.발음듣기

So the theist is left with this position: either the theist has to say there is no evil in the world, or the theist has to give up one of these features of their God.발음듣기

Those are your two options. Neither of them look very appealing.발음듣기

And so now we're in a position to say, "If you don't want to do that, "you are an irrational theist," that there is compelling evidence that God does not exist, God of this OOO kind does not exist, and yet, you believe anyway.발음듣기

That is to say, you believe a contradiction.발음듣기

You believe that there is evil, and there is no evil.발음듣기

You believe that there is this kind of god, there isn't this kind of god.발음듣기

We saw before that belief in contradictions is a bad thing, and you ought to avoid it wherever you can.발음듣기

And so this is the argument that you should not be a theist, because irrational theism is not an acceptable form of theism.발음듣기

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