I just watched this clip from the Unbelievable podcast with Justin Brierly where Richard Dawkins said he finds the moral argument utterly unconvincing, but he thinks the fine-tuning argument is the best argument for God and that if there were any argument that might convince him to be a deist, that would be it.
I found that interesting because for the longest time, fine-tuning arguments (and teleological arguments in general) have struck me as being the least persuasive arguments, and the moral argument has struck me as being the most convincing. The Kalam was a close second for a while there, but that has slipped a little. I've recently started to come around on the fine-tuning argument, but the moral argument remains the most convincing argument to me.
I should say, though, that in my own thinking, I don't take the various arguments for God as stand-alone arguments. I take them more as premises in a whole case for God, which I explained in another post.
But lemme explain why I find the moral argument to be so persuasive. This isn't meant to be a full blown defense of the moral argument, just a bit of autobiography really.
There are essentially two premises in the moral argument. One is that there couldn't be a real moral law unless there were a God. The second is that there is a real moral law. If those two premises are true, then it's inescapable that there's a God. The existence of God would follow necessarily from those two premises.
In spite of everything I've heard to the contrary, the first premise seems almost logically certain. What I mean by a real moral law are prescriptive obligations that transcend societies and cultures. They are objective in the sense that they don't exist merely because we feel a certain way, or becasue we value certain things, or that we've made a pact among ourselves, or even because we've passed certain laws. While they impose themselves on us, they are not a product of us.
I don't see how there could possibly be a particular way that people were obligated to live unless there were somebody who imposed that obligation on them. There can't be a way we're supposed to behave is nobody supposes us to behave that way. There can't be a way we are meant to be if nobody means for us to be that way. I mean there couldn't be traffic laws if there weren't a governing authority, right? You need some kind of an authority behind any prescriptive rule of behavior.
But at the same time, I don't see how any creature could fulfill that role for morality. We have all kinds of authority structures in our world that create rules--governments, parents, bosses, military commanders, etc. But none of these authorities are sufficient to explain morality. If these moral laws exist, then they transcend all human institutions. The government can't make something right or wrong by making it legal or illegal. The moral law is above the civil law. It's what we use to judge whether a civil law is a good law or not. In fact, the validity of all human rules and laws are judged by their agreement with some moral standard.
Since no conceivable creature that originated and evolved somewhere in the universe like we did could possibly have the kind of authority required to impose transcendent moral obligations on people, then the source of the moral law must reside in some kind of autonomous supernatural being, which would be a God.
To me, the fact that you can't have objective moral principles without a God is just as obvious as the fact that you can't have a thought without somebody who is thinking it. That first premise in the moral argument has the same intuitive appeal to me as Descartes cogito which is almost logically certain. Maybe it is logically certain.
So it just comes down to that second premise. Now, I fully admit that I can't prove that second premise. And that second premise is not as obvious to me as the first premise. For me, the first premise comes very close to a logical certainty, but the second premise comes nowhere near a logical certainty. If it's not a logical certainty, but it also can't be proved, then why do I believe it?
I've written a lot on my blog about that (here for example), but basically it just comes down to being perfectly honest with myself. No matter what possibilities a person may raise about the meaninglessness of everything, if I'm perfectly honest with myself, I cannot bring myself to seriously doubt that there are real moral obligations or that what we do does ultimately matter in the big scheme of things.
I have no problem sitting around with a bunch of people speculating about the possibility of there being no real right and wrong save the ones we've made up or evolved to believe. But to me that's no different than when you're a teenager or a young adult sitting around smoking a doobie with your friends and talking about how you might all be parasites in a giant goat's stomach, or characters in somebody's computer game, or maybe even just dreaming the whole thing. When I was a kid, I used to toy around with solipsism all the time, and I even believed I took it seriously. But I didn't, and some time in my mid 20's or so when I decided to start taking philosophy seriously and start being honest with myself, I gave up all that nonsense as just childish playing at philosophy. There's no real reason to doubt the external world, and there's no real reason to doubt morality. And if I'm perfeclty honest with myself, I'm just as convinced of one as I am the other. I don't need it to be proved. In fact, it can't be proved. But I think it more than reasonable to believe and downright nutty to deny it.
I also think most people, whether they'll admit it or not, really would find themselves believing in both morality and the extenal world if they'd just stop playing philosophical games and be honest with themselves. The fact that moral non-realists are rarely ever consistent betrays them. Just as an idealists takes the apparent external world just as seriously as a naturalist or a dualist, so also do moral nihilists, subjectivists, and relativists behave as if morality were objective. This is evident in a number of things, not least of which is the fact that they hold other people to moral standards as if those standards actually applied to those people. I even had a moral nihilist one time tell me he thought it was ironic that a lot of moral objectivists were less moral than their moral relativist counterparts. How could one be worse than the other if there's no standard? This person lacked self-awareness, and I think most moral non-realists probably do as well. They are literally in denial.
So, I don't think it's just me who is hardwired to believe in morality in spite of the fact that it can't be proved. I think every mentally healthy person is hardwired that way. People can deny what they are hardwired to believe, but they rarely live consistently with that denial. If you're one of those people who are in denial about there being a universal objective standard of right and wrong, just stop it. Be honest with yourself. Think about that shooting in Uvalde that happened recently and ask yourself, "In the great scheme of things, can I honestly say there's nothing wrong with walking into a school and shooting a bunch of kids for no other reaon than the fact that you're frustrated with life or that you hate the world"? Be serious.
So that's it. There's a transcendent moral law that imposes itself on us but did not originate with us. There can't be such a law unless there's a God. It follows inescapably that there's a God. If you affirm both of those premises, but you deny the existence of a God, then you're being irrational. The reason I find the moral argument so convincing is because I am forced by the power of logical necessity to conclude that God exists because of premises that I cannot honestly bring myself to deny.