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Do you think the seeming improbability of the origin of life is evidence for theism?
I don’t mean with respect to so-called cosmic "fine tuning." I refer to the fact that even with our potentially finely tuned cosmos it’s still incredibly unlikely that life would emerge. I took an earth science course in college, and our prof said that Abiogenesis is still the main theory: namely, non living matter gave rise to living matter through a combination of exquisitely improbable events. A bunch of chemicals mixed with other chemicals and were struck by lightning or something, creating the first self-replicating molecule. If you protest “but that’s about as likely as a fighter jet being assembled out of chance collisions,” he says “given the law of large numbers, given enough opportunities a fantastically unlikely event will eventually happen. And the observable universe is just so so vast.
I just realized this might imply that, actually, there probably is a fighter jet somewhere in the universe that arose from chance collisions of matter, or at least that this result wasn't any less likely than life arising from nonliving matter. If you say no to the fighter jet thing, but yes to a self-replicating molecular machine finding a stable enough environment in which to proliferate for millions of years, then presumably you would need to explain the asymmetry in your expectations.
Maybe the chance fighter jet is just… even more unlikely than that? Based on what? The fact that there are many more optimally arranged parts involved in a fighter jet? Maybe, but if that’s actually true, why have we been able to create fighter jets, but not engineer a self-replicating molecular organism from inorganic matter?
About cosmic "fine tuning":
If you buy any of the typical objections to cosmological fine tuning, there is a concern about whether your view "proves too much" by failing to admit of scenarios that would intuitively serve as compelling evidence for Christianity. For instance, in a universe in which the words "made-by-Jesus-Christ" were written into every square inch of matter as a direct result of the way the initial parameters of the universe were ordered, you would have to conclude that we had absolutely zero evidence in favor of Christianity.
Typical Objection to Fine-Tuning #1: "But we don't know how to weight the prior probabilities of alternative universes. At best, we can only assume that the life-permitting parameters are unlikely given all of the non-life-permitting alternatives."
This is equally true of the made-by-Jesus world, but do you really want to say that that world would offer no evidence in favor of Christianity? Isn't that just an unreasonably high degree of skepticism?
Typical Objection to Fine-Tuning #2: "According to the anthropic principle, we wouldn't be in a position to ask about how we appeared in a life-permitting universe if it hadn't been life-permitting to begin with, so fine-tuning requires no explanation/is explained by the fact that it had to happen from our POV."
It's not always clear what is being proposed by the objector making the anthropic principle argument, but on one interpretation the objection is saying something like "any phenomenon which presupposes an explainer requires no explanation/is automatically explained by the fact that it allows for an explainer to exist and wonder about it."
So, for instance, we needn't explain the complexity of life via evolution because had it not occurred, we wouldn't be in a position to wonder about it. Or a falling man who prays for a parachute and is saved when one spontaneously materializes out of thin air needn't explain this miracle because, had it not occurred, he wouldn't be alive to consider candidate explanations.
But notice that the anthropic principle objection can also be posed to the "made-by-Jesus" world, and even still, the "made-by-Jesus" world would be compelling evidence in favor of Christianity.
Typical Objection to Fine-Tuning #3: God could have any number of purposes. Why assume that he wants life to evolve?
This equally applies to the "Made-by-Jesus" world. I can imagine any number of deities who don't want to create a made-by-Jesus world. So in the "made-by-Jesus" world would we have absolutely zero indication that Christianity is true?
Typical Objection to Fine-Tuning #4: Maybe the fine-tuning is just necessary and had to be that way. Since God is supposed to be a necessary being, is it any better to suppose that an explanation that proposes a necessary God + a contingent universe is better than simply a necessary universe all on its own?
This equally applies to the "Made-by-Jesus" world. Maybe the initial parameters of the universe just had to be set up so that the words "made-by-Jesus-Christ" were written into every square inch of matter everywhere. So is the "made-by-Jesus" world not strong evidence for Christianity?
Typical Objection to Fine-Tuning #5: If the multi-verse hypothesis is true, then a finely tuned universe is due to chance. Given enough opportunities, a life permitting arrangement of the parameters will eventually come about, no matter how unlikely one is.
This equally applies to the "Made-by-Jesus" world. So is the "made-by-Jesus" world not strong evidence for Christianity?
Typical Objection to Fine-Tuning #6: There's no telling whether the other parameters of the universe would be life-permitting.
The typical response to this objection is to point out that the features of the universe on which the parameters depend are extremely broad, so that changes would result in a world where, say, all we would have is a distribution of matter in a pattern of random TV static, or each particle being separated from the other by so much space that complex structures could never form, or a giant undifferentiated lump of matter, etc.
But anyway, why couldn't the same objection be made to the "made-by-Jesus" world? For all we know, most arrangements of the parameters of the universe result in a "made-by-Jesus world." We haven't observed those universes, so who is really to say otherwise?
Typical Objection to Fine-Tuning #7: The fine-tuning argument is just an appeal to our ignorance, or a "god-of-the-gaps"-style inference.
Is this also true of saying that the truth of Christianity is a good explanation for the made-by-Jesus universe?
TL;DR: If you buy any of the typical objections to cosmological fine tuning, there is a concern about whether your view "proves too much" by failing to admit scenarios that would intuitively serve as compelling evidence for Christianity. For instance, in a universe in which the words "made-by-Jesus-Christ" were written into every square inch of matter as a direct result of the way the initial parameters of the universe were ordered, you would have to conclude that we had absolutely zero evidence in favor of Christianity.
I think life probably originated from a relatively simple reaction that managed to continuously propagate. There was a primordial stew, and a bunch of carbon and oxygen and hydrogen and probably other elements started reacting in a way that they could pull in more fuel from the surroundings instead of the reaction just dying out. In its early stages it really wasn't anything you would call life. But the parts of the reaction that were best at getting more fuel spread the fastest, and the equilibrium kept shifting, and the chemical reaction kept semi-randomly stumbling onto more and more efficient ways to get more fuel. Eventually the chemical reaction develops a process something like mitosis, where it splits in two and each part goes off in different directions, and those parts keep splitting off themselves when they get sufficiently large, and the ones that are best at getting more fuel stay "alive" and spread the most. And that's the beginning of life.
I don't think that that's necessarily so incredibly unlikely in the right environment with the right chemicals. But it'd probably take a very long time and very precise conditions that don't allow for the initial reaction to just burn through all the fuel itself without splitting to happen.
There is a section in Dawkins' "The Ancestors Tale" which makes a 'flipped' version of this argument. Perhaps the process starts with a chemical that has this duplication-like property, and then it turns into competition for what spreads/duplicates best:
pg 571 of the hardback edition
Dawkins' goes on to discuss a real example of a (relatively) simple 'abzase', an amino adenosine triacid ester (AATE), that has this property. In that case, 'A' is amino adenosine and 'B' is a pentafluorophenyl ester.
edit: this is the same as the middle bullet point from recovering_rationaleist's comment
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