Category Archives: Polemics

William Lane Craig assesses Sam Harris’ attempt to ground morality on atheism

This Reasonable Faith article is worth a read.

First, objective moral values:

So how does Sam Harris propose to solve the “value problem”? The trick he proposes is simply toredefine what he means by “good” and “evil” in nonmoral terms.9 He says we should “define ‘good’ as that which supports [the] well-being” of conscious creatures.”10 He states, “Good and evil need only consist in this: misery versus well-being.”11 Or again: “In speaking of ‘moral truth,’ I am saying that there must be facts regarding human and animal well-being.”12

So, he says, “Questions about values … are really questions about the well-being of conscious creatures.”13 Therefore, he concludes, “It makes no sense … to ask whether maximizing well-being is ‘good’.”14 Why not? Because he’s redefined the word “good” to mean the well-being of conscious creatures. So to ask, “Why is maximizing creatures’ well-being good?” is on his definition the same as asking, “Why does maximizing creatures’ well-being maximize creatures’ well-being?” It is simply a tautology — talking in a circle. Thus, Harris has “solved” his problem simply by redefining his terms. It is mere word play.

Second, objective moral duties:

Does atheism provide a sound foundation for objective moral duties? Duty has to do with moral obligation and prohibition, what I ought or ought not to do. Here reviewers of The Moral Landscape have been merciless in pounding Harris’ attempt to provide a naturalistic account of moral obligation. Two problems stand out.

Natural science tells us only what is, not what ought to be, the case. As philosopher Jerry Fodor has written, “Science is about facts, not norms; it might tell us how we are, but it wouldn’t tell us what is wrong with how we are.”17 In particular it cannot tell us that we have a moral obligation to take actions that are conducive to human flourishing.

[…]Second, “ought” implies “can.” A person is not morally responsible for an action he is unable to avoid. For example, if somebody shoves you into another person, you are not to blame for bumping into this person. You had no choice. But Harris believes that all of our actions are causally determined and that there is no free will.20 Harris rejects not only libertarian accounts of freedom but also compatibilistic accounts of freedom. But if there is no free will, no one is morally responsible for anything. In the end, Harris admits this, though it’s tucked away in his endnotes. Moral responsibility, he says, “is a social construct,” not an objective reality: “in neuroscientific terms no person is more or less responsible than any other” for the actions they perform.21 His thoroughgoing determinism spells the end of any hope or possibility of objective moral duties on his worldview because we have no control over what we do.

If you missed the debate between William Lane  and Sam Harris, here is the video:

And you can read a summary of the debate, written by me. There’s audio in that post, as well.

What conditions support the minimum requirements for complex life?

The Circumstellar Habitable Zone (CHZ)

What do you need in order to have a planet that supports complex life? First, you need liquid water at the surface of the planet. But there is only a narrow range of temperatures that can support liquid water. It turns out that the size of the star that your planet orbits around has a lot to do with whether you get liquid water or not. A heavy, metal-rich star allows you to have a habitable planet far enough from the star so  the planet can support liquid water on the planet’s surface while still being able to spin on its axis. The zone where a planet can have liquid water at the surface is called the circumstellar habitable zone (CHZ). A metal-rich star like our Sun is very massive, which moves the habitable zone out further away from the star. If our star were smaller, we would have to orbit much closer to the star in order to have liquid water at the surface. Unfortunately, if you go too close to the star, then your planet becomes tidally locked, like the moon is tidally locked to Earth. Tidally locked planets are inhospitable to life.

Circumstellar Habitable Zone
Circumstellar Habitable Zone

Here, watch a clip from The Privileged Planet: (Clip 4 of 12, full playlist here)

But there’s more.

The Galactic Habitable Zone (GHZ)

So, where do you get the heavy elements you need for your heavy metal-rich star?

You have to get the heavy elements for your star from supernova explosions – explosions that occur when certain types of stars die. That’s where heavy elements come from. But you can’t be TOO CLOSE to the dying stars, because you will get hit by nasty radiation and explosions. So to get the heavy elements from the dying stars, your solar system needs to be in the galactic habitable zone (GHZ) – the zone where you can pickup the heavy elements you need but not get hit by radiation and explosions. The GHZ lies between the spiral arms of a spiral galaxy. Not only do you have to be in between the arms of the spiral galaxy, but you also cannot be too close to the center of the galaxy. The center of the galaxy is too dense and you will get hit with massive radiation that will break down your life chemistry. But you also can’t be too far from the center, because you won’t get enough heavy elements because there are fewer dying stars the further out you go. You need to be in between the spiral arms, a medium distance from the center of the galaxy.

Like this:

Galactic Habitable Zone
Galactic Habitable Zone and Solar Habitable Zone

Here, watch a clip from The Privileged Planet: (Clip 10 of 12, full playlist here)

The GHZ is based on a discovery made by astronomer Guillermo Gonzalez, which made the front cover of Scientific American in 2001. That’s right, the cover of Scientific American. I actually stole the image above of the GHZ and CHZ (aka solar habitable zone) from his Scientific American article (linked above).

These are just a few of the things you need in order to get a planet that supports life.

Here are a few of the more well-known ones:

  • a solar system with a single massive Sun than can serve as a long-lived, stable source of energy
  • a terrestrial planet (non-gaseous)
  • the planet must be the right distance from the sun in order to preserve liquid water at the surface – if it’s too close, the water is burnt off in a runaway greenhouse effect, if it’s too far, the water is permanently frozen in a runaway glaciation
  • the solar system must be placed at the right place in the galaxy – not too near dangerous radiation, but close enough to other stars to be able to absorb heavy elements after neighboring stars die
  • a moon of sufficient mass to stabilize the tilt of the planet’s rotation
  • plate tectonics
  • an oxygen-rich atmosphere
  • a sweeper planet to deflect comets, etc.
  • planetary neighbors must have non-eccentric orbits

By the way, you can watch a lecture with Guillermo Gonzalez explaining his ideas further. This lecture was delivered at UC Davis in 2007. That link has a link to the playlist of the lecture, a bio of the speaker, and a summary of all the topics he discussed in the lecture. An excellent place to learn the requirements for a suitable habitat for life.

Natalie Wolchover: Will science one day rule out the possibility of atheism?

Here’s an article by Natalie Wolchover on Live Science. (And note that I engaged with people in the comments to that article)

She writes:

Over the past few centuries, science can be said to have gradually chipped away at the traditional grounds for believing in God. Much of what once seemed mysterious — the existence of humanity, the life-bearing perfection of Earth, the workings of the universe — can now be explained by biology, astronomy, physics and other domains of science.

I find this statement odd. We theists think about evidence that has emerged relatively recently that supports theism and we are wondering why anyone is still an atheist in view of the progress of science.

Here is some of the evidence we theists are looking at:

  • the cosmic microwave background radiation
  • the helium/hydrogen abundance predictions
  • the redshift of light from distant galaxies
  • the cosmic fine tuning (constants)
  • the cosmic fine tuning (quantities)
  • the construction of amino acids on the early earth
  • biological information in proteins and DNA
  • sudden origin of phyla Cambrian explosion
  • biological convergence
  • galactic fine-tuning (e.g. – GHZ)
  • circumstellar fine-tuning (e.g. – CHZ)
  • irreducible complexity of molecular machines like the cilium
  • natural limits to biological change (i.e. – the Lenski experiments)
  • genome functionality now rated at 80% or more

We use that evidence to support premises in our arguments. We think that science is moving towards belief in a Creator and Designer. But not our staff writer Natalie Wolchover. She has found a way to save atheism from the progress of science.

The evidence for a beginning of the universe

Let’s take a closer look at what atheists say about the universe:

Gobs of evidence have been collected in favor of the Big Bang model of cosmology, or the notion that the universe expanded from a hot, infinitely dense state to its current cooler, more expansive state over the course of 13.7 billion years. Cosmologists can model what happened from 10^-43 seconds after the Big Bang until now, but the split-second before that remains murky. Some theologians have tried to equate the moment of the Big Bang with the description of the creation of the world found in the Bible and other religious texts; they argue that something — i.e., God — must have initiated the explosive event.

However, in Carroll’s opinion, progress in cosmology will eventually eliminate any perceived need for a Big Bang trigger-puller.

As he explained in a recent article in the “Blackwell Companion to Science and Christianity” (Wiley-Blackwell, 2012), a foremost goal of modern physics is to formulate a working theory that describes the entire universe, from subatomic to astronomical scales, within a single framework. Such a theory, called “quantum gravity,” will necessarily account for what happened at the moment of the Big Bang. Some versions of quantum gravity theory that have been proposed by cosmologists predict that the Big Bang, rather than being the starting point of time, was just “a transitional stage in an eternal universe,” in Carroll’s words. For example, one model holds that the universe acts like a balloon that inflates and deflates over and over under its own steam. If, in fact, time had no beginning, this shuts the book on Genesis.

A speculative quantum gravity model?

Let’s see what the peer-reviewed research says:

At the close of their analysis of Linde’s Chaotic Inflationary Model, Borde and Vilenkin say with respect to Linde’s metaphysical question, “The most promising way to deal with this problem is probably to treat the Universe quantum mechanically and describe it by a wave function rather than by a classical spacetime.”{37} They thereby allude to the last class of models attempting to avoid the initial cosmological singularity which we shall consider, namely, Quantum Gravity Models. Vilenkin and, more famously, James Hartle and Stephen Hawking have proposed models of the universe which Vilenkin candidly calls exercises in “metaphysical cosmology.”{38}In his best-selling popularization of his theory, Hawking even reveals an explicitly theological orientation. He concedes that on the Standard Model one could legitimately identify the Big Bang singularity as the instant at which God created the universe.{39} Indeed, he thinks that a number of attempts to avoid the Big Bang were probably motivated by the feeling that a beginning of time “smacks of divine intervention.”{40} He sees his own model as preferable to the Standard Model because there would be no edge of space-time at which one “would have to appeal to God or some new law.”{41}

[…]The question which arises for this construal of the model is whether such an interpretation is meant to be taken realistically or instrumentally. On this score, there can be little doubt that the use of imaginary quantities for time is a mere mathematical device without ontological significance. Barrow observes, “physicists have often carried out this ‘change time into space’ procedure as a useful trick for doing certain problems in ordinary quantum mechanics, although they did not imagine that time was really like space. At the end of the calculation, they just swop [sic] back into the usual interpretation of there being one dimension of time and three . . . dimensions of . . . space.”{48} In his model, Hawking simply declines to re-convert to real numbers. If we do, then the singularity re-appears. Hawking admits, “Only if we could picture the universe in terms of imaginary time would there be no singularities . . . . When one goes back to the real time in which we live, however, there will still appear to be singularities.”{49} Hawking’s model is thus a way of re-describing a universe with a singular beginning point in such a way that that singularity is transformed away; but such a re-description is not realist in character.

Quantum gravity is a theoretical model that uses imaginary time. When translated back into the real world, the singularity re-appears, and the need for a cause of the universe coming into being is re-asserted.

Natalie explains how strong her speculation really is:

Another way to put it is that contemporary physics theories, though still under development and awaiting future experimental testing, are turning out to be capable of explaining why Big Bangs occur, without the need for a supernatural jumpstart. As Alex Filippenko, an astrophysicist at the University of California, Berkeley, said in a conference talk earlier this year, “The Big Bang could’ve occurred as a result of just the laws of physics being there. With the laws of physics, you can get universes.”

See? Their view is “just because theists have all the experimental data for a creation out of nothing today, that doesn’t mean that these speculative theories won’t replace that  hard evidence tomorrow”. But physical laws are descriptions of how matter behaves – they don’t bring matter into being out of nothing. Physical laws can’t explain the origin of the universe because they don’t even exist until there is matter created for them to describe. Even the New York Times knows that. But that what atheists are reduced to – they deny what you can test in a lab, and hope for things to emerge that have never been tested in a lab. That’s atheism.

The evidence for a finely-tuned universe

What does she make of the fine-tuning evidence? Well, she has a speculation to answer the experimental evidence there as well.

She writes:

But there are other potential grounds for God. Physicists have observed that many of the physical constants that define our universe, from the mass of the electron to the density of dark energy, are eerily perfect for supporting life. Alter one of these constants by a hair, and the universe becomes  unrecognizable. “For example, if the mass of the neutron were a bit larger (in comparison to the mass of the proton) than its actual value, hydrogen would not fuse into deuterium and conventional stars would be impossible,” Carroll said. And thus, so would life as we know it.

Theologians often seize upon the so-called “fine-tuning” of the physical constants as evidence that God must have had a hand in them; it seems he chose the constants just for us. But contemporary physics explains our seemingly supernatural good luck in a different way.

Some versions of quantum gravity theory, including string theory, predict that our life-giving universe is but one of an infinite number of universes that altogether make up the multiverse. Among these infinite universes, the full range of values of all the physical constants are represented, and only some of the universes have values for the constants that enable the formation of stars, planets and life as we know it. We find ourselves in one of the lucky universes (because where else?).

A speculative multiverse? Why should we take a speculative multiverse over one observable, knowable experimentally-testable universe?

Let’s see what the peer-reviewed science says:

The feebleness of gravity is something we should be grateful for. If it were a tiny bit stronger, none of us would be here to scoff at its puny nature.

The moment of the universe‘s birth created both matter and an expanding space-time in which this matter could exist. While gravity pulled the matter together, the expansion of space drew particles of matter apart – and the further apart they drifted, the weaker their mutual attraction became.

It turns out that the struggle between these two was balanced on a knife-edge. If the expansion of space had overwhelmed the pull of gravity in the newborn universe, stars, galaxies and humans would never have been able to form. If, on the other hand, gravity had been much stronger, stars and galaxies might have formed, but they would have quickly collapsed in on themselves and each other. What’s more, the gravitational distortion of space-time would have folded up the universe in a big crunch. Our cosmic history could have been over by now.

Only the middle ground, where the expansion and the gravitational strength balance to within 1 part in 1015 at 1 second after the big bang, allows life to form.

That’s what the science says. That’s what we know from experiments.

An MIT physicist Alan Lightman explains how much evidence there is for the multiverse:

The… conjecture that there are many other worlds… [T]here is no way they can prove this conjecture. That same uncertainty disturbs many physicists who are adjusting to the idea of the multiverse. Not only must we accept that basic properties of our universe are accidental and uncalculable. In addition, we must believe in the existence of many other universes. But we have no conceivable way of observing these other universes and cannot prove their existence. Thus, to explain what we see in the world and in our mental deductions, we must believe in what we cannot prove.

Sound familiar? Theologians are accustomed to taking some beliefs on faith. Scientists are not. All we can do is hope that the same theories that predict the multiverse also produce many other predictions that we can test here in our own universe. But the other universes themselves will almost certainly remain a conjecture.

This is a non-theistic scientist telling us this. There is no evidence for the multiverse, just like there is no evidence for Santa Claus, just like there is no evidence for the Tooth Fairy. Yet atheists are driven to speculate about whether Santa Claus and the Tooth Fairy might be real, in order to escape the fine-tuning. And atheism just goes on and on and on like this – from the origin of life’s building blocks, to junk DNA, to the Cambrian explosion, to protein synthesis, to galactic habitability, to DNA sequences, and so on – it’s madness stacked on top of delusion stacked on top of insanity. It’s just speculative nonsense and the denial of today’s cutting-edge peer-reviewed experimental evidence.

What is causing them to do this? What is their motivation for wanting atheism to be true?

UPDATE: A response from Uncommon Descent.