Ok, if we're now going through texts, research, and media, here's the argument.
Have fun!
http://www.rfmedia.org/RF_audio_video/RF_podcast/Creation-Out-of-Nothing.mp3
Defenders Podcast
The discovery during our generation of the so-called anthropic coincidences in the initial conditions of the universe has breathed new life into the teleological argument. Use of the Anthropic Principle to nullify our wonder at these coincidences is logically fallacious unless conjoined with the metaphysical hypothesis of a World Ensemble. There are no reasons to believe that such an Ensemble exists nor that, if it does, it has the properties necessary for the Anthropic Principle to function. Typical objections to the alternative hypothesis of divine design are not probative.
To begin with the most general of conditions, it was shown by G. J. Whitrow in 1955 that intelligent life would be impossible except in a universe of three basic dimensions. When formulated in three dimensions, mathematical physics possesses many unique properties which are necessary prerequisites for the existence of rational information-processing observers like ourselves. Moreover, dimensionality plays a key role in determining the form of the laws of physics and in fashioning the roles played by the constants of nature. For example, it is due to its basic three-dimensionality that the world possesses the chemistry that it does, which furnishes some key conditions necessary for the existence of life. Whitrow could not answer the question why the actual universe happens to possess three dimensions, but noted that if it did not, then we should not be here to ask the question.
More specifically, the values of the various forces of nature appear to be fine-tuned for the existence of intelligent life. The world is conditioned principally by the values of the fundamental constants a (the fine structure constant, or electromagnetic interaction), mn/me (proton to electron mass ratio, aG (gravitation), aw (the weak force), and as (the strong force). When one mentally assigns different values to these constants or forces, one discovers that in fact the number of observable universes, that is to say, universes capable of supporting intelligent life, is very small. Just a slight variation in any one of these values would render life impossible.
For example, if as were increased as much as 1%, nuclear resonance levels would be so altered that almost all carbon would be burned into oxygen; an increase of 2% would preclude formation of protons out of quarks, preventing the existence of atoms. Furthermore, weakening as by as much as 5% would unbind deuteron, which is essential to stellar nucleosynthesis, leading to a universe composed only of hydrogen. It has been estimated that as must be within 0.8 and 1.2 its actual strength or all elements of atomic weight greater than four would not have formed. Or again, if aw had been appreciably stronger, then the Big Bang's nuclear burning would have proceeded past helium to iron, making fusion-powered stars impossible. But if it had been much weaker, then we should have had a universe entirely of helium. Or again, if aG had been a little greater, all stars would have been red dwarfs, which are too cold to support life-bearing planets. If it had been a little smaller, the universe would have been composed exclusively of blue giants which burn too briefly for life to develop. According to Davies, changes in either aG or electromagnetism by only one part in 1040 would have spelled disaster for stars like the sun. Moreover, the fact that life can develop on a planet orbiting a star at the right distance depends on the close proximity of the spectral temperature of starlight to the molecular binding energy. Were it greatly to exceed this value, living organisms would be sterilized or destroyed; but were it far below this value, then the photochemical reactions necessary to life would proceed too slowly for life to exist. Or again, atmospheric composition, upon which life depends, is constrained by planetary mass. But planetary mass is the inevitable consequence of electromagnetic and gravitational interactions. And there simply is no physical theory which can explain the numerical values of a and mn/me that determine electromagnetic interaction.
Moreover, life depends upon the operation of certain principles in the quantum realm. For example, the Pauli Exclusion Principle, which states that no more than one particle of a particular kind and spin is permitted in a single quantum state, plays a key role in nature. It guarantees the stability of matter and the size of atomic and molecular structures and creates the shell structure of atomic electrons. In a world not governed by this principle, only compact, superdense bodies could exist, providing little scope for complex structures or living organisms. Or again, quantization is also essential for the existence and stability of atomic systems. In quantum physics, the atom is not conceived on the model of a tiny solar system with each electron in its orbit around the nucleus. Such a model would be unstable because any orbit could be an arbitrary distance from the nucleus. But in quantum physics, there is only one orbital radius available to an electron, so that, for example, all hydrogen atoms are alike. As a consequence, atomic systems and matter are stable and therefore life-permitting.
Classical Cosmology
Several of the constants mentioned in the foregoing section also play a crucial role in determining the temporal phases of the development of the universe and thus control features of the universe essential to life. For example, aG, and mn/me constrain (i) the main sequence stellar lifetime, (ii) the time before which the expansion dynamics of the expanding universe are determined by radiation rather than matter, (iii) the time after which the universe is cool enough for atoms and molecules to form, (iv) the time necessary for protons to decay, and (v) the Planck time.
Furthermore, a fine balance must exist between the gravitational and weak interactions. If the balance were upset in one direction, the universe would have been constituted by 100% helium in its early phase, which would have made it impossible for life to exist now. If the balance were tipped in the other direction, then it would not have been possible for neutrinos to blast the envelopes of supernovae into space and so distribute the heavy elements essential to life.
Furthermore, the difference between the masses of the neutron and the proton is also part of a very delicate coincidence which is crucial to a life-supporting environment. This difference prevents protons from decaying into neutrons, which, if it happened, would make life impossible. This ratio is also balanced with the electron mass, for if the neutron mass failed to exceed the proton mass by a little more than the electron mass, then atoms would simply collapse.
Considerations of classical cosmology allow us to introduce a new parameter, S, the entropy per baryon in the universe, which is about 109. Unless S were < 1011, galaxies would not have been able to form, making planetary life impossible. S is itself a consequence of the baryon asymmetry in the universe, which arises from the inexplicably built-in asymmetry of quarks ever anti-quarks prior to 10-6 seconds after the Big Bang.
In investigating the initial conditions of the Big Bang, one is also confronted with two arbitrary parameters governing the expansion of the universe: Wo, related to the density of the universe, and Ho, related to the speed of the expansion. Observations indicate that at 10-43 seconds after the Big Bang the universe was expanding at a fantastically special rate of speed with a total density close to the critical value on the borderline between recollapse and everlasting expansion. Hawking estimated that even a decrease of one part in a million million when the temperature of the universe was 1010 degrees would have resulted in the universe's recollapse long ago; a similar increase would have precluded the galaxies from condensing out of the expanding matter. At the Planck time, 10-43 seconds after the Big Bang, the density of the universe must have apparently been within about one part in 1060 of the critical density at which space is flat. This results in the so-called "flatness problem": why is the universe expanding at just such a rate that space is Euclidean rather than curved? A second problem that arises is the "homogeneity problem." There is a very narrow range of initial conditions which must obtain if galaxies are to form later. If the initial inhomogeneity ratio were > 10-2, then non-uniformities would condense prematurely into black holes before the stars form. But if the ratio were < 10-5, inhomogeneities would be insufficient to condense into galaxies. Because matter in the universe is clumped into galaxies, which is a necessary condition of life, the initial inhomogeneity ratio appears to be incredibly fine-tuned. Thirdly, there is the "isotropy problem." The temperature of the universe is amazing in its isotropy: it varies by less than one part in a thousand over the whole of the sky. But at very early stages of the universe, the different regions of the universe were causally disjointed, since light beams could not travel fast enough to connect the rapidly receding regions. How then did these unconnected regions all happen to possess the same temperature and radiation density? Penrose has calculated that in the absence of new physical principles to explain this, "the accuracy of the Creator's aim" when he selected this world from the set of physically possible ones would need to have been at least of the order of one part in 1010(123)!
Contemporary cosmologists have found an answer to these three problems—or at least seem certain that they are on its track—in inflationary models of the early universe. According to this adjustment to the standard Big Bang cosmology, between 10-43 and 10-35 seconds after the Big Bang, the universe underwent an exponentially rapid inflation of space faster than the speed of light. This inflationary epoch resulted in the nearly flat curvature of space, pushed inhomogeneities beyond our horizon, and served to bury us far within a single region of space-time whose parts were causally connected at pre-inflationary times.
Inflationary scenarios have problems of their own—such as getting inflation started, getting it to end without excess turbulence, and having it produce irregularities just right for galaxy formation. Indeed, it is interesting to note that Hawking has recently declared both the so-called "old inflationary model" and the "new inflationary model" to be "now dead as a scientific theory"—though he still holds out hope for Linde's more recent "chaotic inflationary model."[2] Whether this model proves to be any more successful than its predecessors remains yet to be seen; the whole inflationary scenario seems rather ad hoc, and one cannot help but suspect that much of the attraction to such models is due to the desire to escape the sort of inferences as Penrose's conclusion above. More importantly, however, inflationary scenarios seem to require the same sort of fine-tuning which some theorists thought these models had eliminated. For example, in order to proceed appropriately, inflation requires that the two theoretical components of Einstein's cosmological constant, "bare lambda" and "quantum lambda," cancel each other out with an enormously precise though inexplicable accuracy. A change in the strengths of either aG or aw by as little as one part in 10100 would destroy this cancellation on which our lives depend. So although inflationary models may succeed in providing a unifying explanation of some of the forces which play a role in classical cosmology, it does not thereby dispense with the appearance of fine-tuning or teleology.
Biochemistry
Life which is descended from a simpler form of life and which ultimately came into existence spontaneously must be based on water, carbon dioxide, and the basic compounds of the elements C, H, O, and N. Each of these possesses unique properties which, while not sufficient for the existence of life, are necessary conditions of it.
Water, for example, is one of the strangest substances known to science. Its specific heat, surface tension, and most of its other physical properties have anomalous values higher or lower than any other known material. The fact that its solid phase is less dense than its liquid phase, so that ice floats, is virtually a unique property in nature. Its melting point, boiling point, and vaporization point are all anomalously higher than those of other substances. For example, when calculated by atomic weight and number, the boiling point of water would be expected to be -100oC rather than +100oC. The disparity is due to its strong hydrogen bonds, which are difficult to break. Furthermore, because the H-O-H angle in water is so close to the ideal tetrahedral structure, water can form such a structure with very little strain on the bonds. As a result, it tends to polymerize into an open structure, so that ice is less dense than water. This property of water is essential to life, for were ice more dense than water, it would sink to the bottom of bodies of water, where it would remain in the deepest parts until eventually all lakes and oceans would be solidly frozen. Instead, ice forms a protective skin on the surface of reservoirs of water. Water also has a higher specific heat than almost any organic compound. This property allows water to be a store of heat and so stabilize the environment. The thermal conductivity of water is also higher than that of most liquids, which again permits water to act as a temperature stabilizer on the environment. Water has, moreover, a higher heat of vaporization than any known substance. This makes water the best possible coolant by evaporation, and living creatures make extensive use of it in temperature control. Water's high surface tension, exceeded by very few substances, serves to make biochemical reactions more rapid; and the way water bonds shapes organic molecules such as enzymes and nucleic acids into their biologically active forms and permits the formation of cell walls and membranes.
The elements H, O, and C are the most abundant elements in living organisms. They possess many unique properties and are vital to chemical reactions necessary to sustain life. For example, CO2 has the property, unique among gases, of having at ordinary temperatures about the same concentration of molecules per unit volume in water as in air. This enables CO2 to undergo perpetual exchange between living organisms and their environment, so that it is everywhere available for photosynthesis and thereby for molecular synthesis. The element N, on the other hand, is a rare element on Earth, but it does make up 80% of the earth's atmosphere, which is a unique stroke of fortune for Earth's living organisms.
This selective sampling of physical and cosmological quantities which are necessary conditions of the existence of intelligent life on Earth at this point in cosmic history illustrates the sort of wider teleology which Tennant emphasized, but could only dimly envision. The discoveries of contemporary science in this regard are particularly impressive for two reasons: (1) The delicate balance of conditions upon which life depends is characterized by the interweaving of conditions, such that life depends for its existence, not merely upon each individual condition's possessing a value within very narrow limits, but also upon ratios or interactions between values and forces which must likewise lie within narrow parameters. The situation is thus not comparable to a roulette wheel in Monte Carlo's yielding a certain winning number; nor even yet to all the roulette wheels (each representing a physical quantity or constant) in Monte Carlo's turning up simultaneously certain numbers within narrowly circumscribed limits (say, wheel 1 must show 72 or 73 while wheel 2 must show 27-29, etc.); rather it is like all the roulette wheels in Monte Carlo's yielding simultaneously numbers within narrowly prescribed limits and those numbers bearing certain precise relations among themselves (say, the number of wheel 3 must be one-half the square of the number of wheel 17 and twice the number of wheel 6). It seems clear that worlds not permitting intelligent life are vastly more to be expected than life-permitting worlds. (2) The constants and quantities which go to make up this complex nexus of conditions are apparently independent of one another. The development of inflationary models ought to cause us to be cautious in making such a claim; nevertheless, it is the case that there seems to be no nomological necessity requiring the quantities and constants of nature to be related as they are. The value of S, for example, seems to be utterly unrelated to the parameters W, Ho, or inflationary scenarios. But even if it were possible to reduce all the physical and cosmological quantities to a single equation governing the whole of nature, such a complex equation could itself be seen as the supreme instance of teleology and design. Hence, some of those whose hopes seem to lie in the discovery of such an equation are forced to assert that such an equation must be necessarily true; that is to say, there is really only one logically possible set of physical constants and forces. But such a hypothesis seems clearly outlandish. As Nagel observes, none of the statements of natural laws in the various sciences are logically necessary, since their denials are not formally contradictory; moreover, the appropriate procedure in science should then cease to be experimentation, but be deductive proofs in the manner of mathematics.[3] Hence, the notion that the nomological necessity of such an equation should reduce to logical necessity seems obviously false.
The Anthropic Principle
This pattern of discoveries has compelled many scientists to conclude that such a delicate balance cannot be simply dismissed as coincidence, but requires some sort of account. Traditionally, such considerations would have been taken as evidence of divine design—one thinks of Paley's teleological argument in his Natural Theology, for example. Loath to admit the God-hypothesis, however, many scientists are seeking an alternative in the Anthropic Principle, and a tremendous debate involving both scientists and philosophers has broken out concerning this principle, a debate which has spilled over into the popular press and captured the attention of science-minded laymen. The attempt to come to grips with the appearance of cosmic teleology has forced many scientists beyond physics into meta-physics, so that the boundaries between science and philosophy have become ineradicably blurred, well-illustrating George Gale's remark that "we are now entering a phase of scientific activity during which the physicist has out-run his philosophical base-camp, and, finding himself cut off from conceptual supplies, he is ready and waiting for some relief from his philosophical comrades-in-arms."[4] The theistic philosopher can therefore without apology or embarrassment introduce his metaphysical commitment to theism as an at least equally plausible, if not superior, alternative explanation to metaphysical, naturalistic accounts of the complex order of the universe.
Exposition
First proposed by Brandon Carter in 1974,[5] the Anthropic Principle has assumed a number of different forms, generating a great deal of confusion concerning what it is precisely that the principle means to assert. In their recent monumental book, The Anthropic Cosmological Principle, physicists John Barrow and Frank Tipler state various versions of the principle, the most fundamental being the Weak Anthropic Principle (WAP):
WAP: The observed values of all physical and cosmological quantities are not equally probable, but they take on values restricted by the requirement that there exist sites where carbon-based life can evolve and by the requirement that the Universe be old enough for it to have already done so.[6]
Barrow and Tipler regard WAP as "in no way speculative or controversial,"[7] since it is "just a restatement . . . of one of the most important and well-established principles of science: that it is essential to take into account the limitations of one's measuring apparatus when interpreting one's observations."[8] For example, if we were calculating the fraction of galaxies that lie within certain ranges of brightness, our observations would be biased toward the brighter ones, since we cannot see the dim ones so easily. Or again, a ratcatcher may say that all rats are bigger than six inches because that is the size of his traps. Similarly, any observed properties of the universe which may initially appear astonishingly improbable can only be seen in their true perspective after we have accounted for the fact that certain properties could not be observed by us, were they to obtain, because we can only observe those compatible with our own existence. "The basic features of the Universe, including such properties as its shape, size, age, and laws of change must be observed to be of a type that allows the evolution of the observers, for if intelligent life did not evolve in an otherwise possible universe, it is obvious that no one would be asking the reason for the observed shape, size, age, and so forth of the universe."[9] Thus, our own existence acts as a selection effect in assessing the various properties of the universe. For example, a life form which evolved on an earthlike planet "must necessarily see the universe to be at least several billion years old and . . . several billion light years across," for this is the time necessary for the production of the elements essential to life and so forth.[10]
Now, we might ask, why is the "observed" in the quotation in the above paragraph italicized? Why not omit the word altogether? The answer is that the resulting statement
1. The basic features of the universe must be of a type that allows the evolution of observers
is undoubtedly false; for it is not logically or nomologically necessary that the universe embrace intelligent life. Rather what seems to be necessarily true is
2. If the universe is observed by observers which have evolved within it, then its basic features must be of a type that allows the evolution of observers within it.
But (2) seems quite trivial; it does nothing to explain why the universe in fact has the basic features it does.
But Barrow and Tipler contend that while WAP appears to be true, but trivial, it has "far-reaching implications."[11] For the implication of WAP, which they seem to interpret along the lines of (2), is that no explanation of the basic features of the universe need be sought. This contention seems to be intimately connected with what is appropriate to be surprised at. The implication of WAP is that we ought not to be surprised at observing the universe to be as it is, for if it were not as it is, we could not observe it. For example, "No one should be surprised to find the universe to be as large as it is."[12] Or again, ". . . on Anthropic grounds, we should expect to observe a world possessing precisely three spatial dimensions."[13] Or again,
We should emphasize once again that the enormous improbability of the evolution of intelligent life in general and Homo sapiens in particular does not mean we should be amazed we exist at all. This would make as much sense as Elizabeth II being amazed she is Queen of England. Even though the probability of a given Briton being monarch is about 10-8, someone must be. Only if there is a monarch is it possible for the monarch to calculate the improbability of her particular existence. Similarly, only if an intelligent species does evolve is it possible for its members to ask how probable it is for an intelligent species to evolve. Both are examples of WAP self-selection in action.110
