I don’t know how I missed this, but apparently Dr. Richard Carrier, a historian, wrote a critique of the fine-tuning argument a while back, and Dr. Luke Barnes, a cosmologist responded to him.
Much of what is said by both of them in their contributions is beyond me, but I did want to quote one part from a blog post by Luke Barnes about whether most scientists accept that our universe is finely-tuned for complex embodied life.
First, Dr. Carrier writes this:
[Dr. William Lane Craig] claims “the fundamental constants and quantities of nature must fall into an incomprehensibly narrow life-permitting range,” but that claim has been refuted–by scientists–again and again. We actually do not know that there is only a narrow life-permitting range of possible configurations of the universe. As has been pointed out to Craig by several theoretical physicists (from Krauss to Stenger), he can only get his “narrow range” by varying one single constant and holding all the others fixed, which is simply not how a universe would be randomly selected. When you allow all the constants to vary freely, the number of configurations that are life permitting actually ends up respectably high (between 1 in 8 and 1 in 4: see Victor Stenger’s The Fallacy of Fine-Tuning).
And Dr. Barnes replies (in part): (links removed)
I’ve said an awful lot in response to that paragraph, so let’s just run through the highlights.
“Refuted by scientists again and again”. What, in the peer-reviewed scientific literature? I’ve published a review of the scientific literature, 200+ papers, and I can only think of a handful that oppose this conclusion, and piles and piles that support it. Here are some quotes from non-theist scientists. For example, Andrei Linde says: “The existence of an amazingly strong correlation between our own properties and the values of many parameters of our world, such as the masses and charges of electron and proton, the value of the gravitational constant, the amplitude of spontaneous symmetry breaking in the electroweak theory, the value of the vacuum energy, and the dimensionality of our world, is an experimental fact requiring an explanation.” [emphasis added.]
“By several theoretical physicists (from Krauss to Stenger)”. I’ve replied to Stenger. I had a chance to talk to Krauss briefly about fine-tuning but I’m still not sure what he thinks. His published work on anthropic matters doesn’t address the more general fine-tuning claim. Also, by saying “from” and “to”, Carrier is trying to give the impression that a great multitude stands with his claim. I’m not even sure if Krauss is with him. I’ve read loads on this subject and only Stenger defends Carrier’s point, and in a popular (ish) level book. On the other hand, Craig can cite Barrow, Carr, Carter, Davies, Deutsch, Ellis, Greene, Guth, Harrison, Hawking, Linde, Page, Penrose, Polkinghorne, Rees, Sandage, Smolin, Susskind, Tegmark, Tipler, Vilenkin, Weinberg, Wheeler, and Wilczek. (See here). With regards to the claim that “the fundamental constants and quantities of nature must fall into an incomprehensibly narrow life-permitting range”, the weight of the peer-reviewed scientific literature is overwhelmingly with Craig. (If you disagree, start citing papers).
There’s more, too.
I wish I understood cosmology enough to understand everything Dr. Barnes says, but it seems to me that this much is clear. If you’re an atheist and you’re reading stuff by these very far-out atheists, then you need to be very careful. Dr. Stenger and Dr. Carrier are both highly-intelligent and have great credentials, but it’s probably better for all of us to be interacting with the other side when we form our worldviews.
I noticed that respected atheist Jeff Lowder has a post up where he looks at both sides and comes down more with Barnes than with Carrier.