The age of the Earth-11: The Earth becomes very old again

(My latest book God vs. Darwin: The War Between Evolution and Creationism in the Classroom has just been released and is now available through the usual outlets. You can order it from Amazon, Barnes and Noble, the publishers Rowman & Littlefield, and also through your local bookstores. For more on the book, see here. You can also listen to the podcast of the interview on WCPN 90.3 about the book.)

For previous posts in this series on the age of the Earth, see here.

The discovery of radioactivity and the associated concept of half-lives of elements opened up the possibility of determining the absolute age of rocks. This argument was developed by Bertram Boltwood in the very early 1900s and is the process now referred to as radiometry (Jackson, p. 237). The argument goes like this. Suppose a sample of rock is found to contain 100 grams of a parent radioactive material P and 300 grams of the stable final daughter element D in its radioactive series, and also suppose that the half-life of this decay has been measured to be 10 years. If we assume that the rock initially had only the parent element P and no D, then we can assume that rock sample initially had 400 grams of P, then after 10 years, it had 200 grams of P and 200 grams of D, then after another 10 years, it would have 100 grams of P and 300 grams of D, and so on. Hence the rock must have been formed 20 years ago.
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The age of the Earth-10: The revolutionary impact of the discovery of radioactivity

(My latest book God vs. Darwin: The War Between Evolution and Creationism in the Classroom has just been released and is now available through the usual outlets. You can order it from Amazon, Barnes and Noble, the publishers Rowman & Littlefield, and also through your local bookstores. For more on the book, see here. You can also listen to the podcast of the interview on WCPN 90.3 about the book.)

For previous posts in this series on the age of the Earth, see here.

The dawn of the 20th century was an extraordinary time of ferment in science. In the case of physics, in addition to the turmoil over the age of the Earth, there was also the well-known crisis that the newly emerging models of the atom as a tiny positively charged nucleus and orbiting negative charges seemed to contradict the well-established theory of electrodynamics. Another crisis was that the ‘luminiferous ether’, the material believed to permeate all space and the carrier of light waves, seemed to be extraordinarily successful in evading all attempts at detecting its presence or its properties. In addition, the blackbody radiation spectrum seemed to defy understanding on the basis of what were thought to be well-established laws of mechanics and radiation.
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The age of the Earth-9: Biologists join the geologists against the physicists

(My latest book God vs. Darwin: The War Between Evolution and Creationism in the Classroom has just been released and is now available through the usual outlets. You can order it from Amazon, Barnes and Noble, the publishers Rowman & Littlefield, and also through your local bookstores. For more on the book, see here. You can also listen to the podcast of the interview on WCPN 90.3 about the book.)

For previous posts in this series on the age of the Earth, see here.

In the case of biology, Darwin’s theory of natural selection had been in retreat during the latter half of the 19th century under the assaults of both physicists and some biologists. Fleeming Jenkin (a physicist, engineer, and collaborator of Kelvin) had, in a review of Origins, delivered a severe critique of Darwin’s theory. He pointed out that not only was the time available insufficient for natural selection to work, but that the then-dominant theory of ‘blending inheritance’ (which said that children had a mixture of the qualities of their parents) worked against Darwin’s theory, since even if one parent experienced an advantageous mutation, that person’s child would only have half of it because the other parent would not have it, the grandchild one-fourth, and so on. The mutation would thus get diluted and disappear over time, and not grow and dominate the population, as natural selection argued.
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The age of the Earth-8: Geologists at loggerheads with physicists

(My latest book God vs. Darwin: The War Between Evolution and Creationism in the Classroom has just been released and is now available through the usual outlets. You can order it from Amazon, Barnes and Noble, the publishers Rowman & Littlefield, and also through your local bookstores. For more on the book, see here. You can also listen to the podcast of the interview on WCPN 90.3 about the book.)

For previous posts in this series on the age of the Earth, see here.

While Kelvin’s estimate of the age of the Earth was interesting in its own right and faced its own supporters and detractors, the undeniably important consequence of his work was that for the first time, pinning down an actual age for the Earth became a question that had the potential to be definitively answered, and this spurred the growth of an entire research area. What Kelvin did that was of immense importance were two things: he demolished the uniformitarians’ vague notions of an almost limitless time for the age of the Earth and established the importance of doing precise calculations; and he began the process, and highlighted the importance, of unifying scientific theories in formerly divergent fields, by introducing physics principles into geological studies.

Kelvin had arrived at an age for the Earth that made it very difficult for natural selection to succeed as a mechanism. Then, as now, results from physics tend to be regarded as on a sounder footing than those from other disciplines. Hence those other fields such as geology and paleontology and biology tend to try and conform to the constraints provided by physics, not the other way around. Kelvin’s estimate of 100 million years as the upper limit for the age of the Earth became part of the scientific lore and geologists and biologists scrambled to accommodate it by trying to find ways to modify their calculations to be consistent with this upper bound. They had some success since each of these calculations depended on many parameters whose values could not be determined precisely, and so there was some room for flexibility.

As for evolution by natural selection, this low upper limit for the age of the Earth caused serious problems. As a result of Kelvin’s and other people’s strong criticisms of the idea of an Earth that was hundreds of millions of years old, by the third edition of Origins, Darwin had abandoned his breezy calculation of a 300 million year old timescale for the formation of the Weald, done somewhat casually at a time when such an age seemed reasonable. Meanwhile Wallace published another book in 1880 that suggested that 200 million years was sufficient for evolution to have worked (Jackson, p. 193). By squeezing here and pinching there, it seemed possible (though just barely) to accommodate 100 million years as sufficient for natural selection to work, but only with great difficulty and at the risk of sacrificing plausibility.

By around 1880, an uneasy truce seemed to have been drawn among the physics, geology, and biology communities around a 100 million year old Earth. But it did not last long. Others came along who followed up on Kelvin’s methods and using more refined calculations and newer estimates for the parameters involved, arrived at even shorter ages of 40 million and then 20 million years for the age of the Earth. Most important among these was an 1893 calculation by Clarence King, the first director of the US Geological Survey who, again basically using Kelvin’s thermal methods, arrived at a figure of 24 million years. In a paper in 1897, towards the end of his long and illustrious career, Kelvin stated his conclusion that the Earth was between 20 and 40 million years old, with King’s value of 24 million being likely most correct.

This caused immense problems for the other areas of science. If it was true, then almost all of geology would have to be drastically re-conceptualized and the theory of evolution by natural selection would have to be thrown out the window, to be replaced by some teleological model of directed evolution that implied planning or design or some other form of supernatural intervention.

But geologists had had enough of conforming to the ever-increasing restrictive limits of the physicists and modifying their parameters accordingly. Their discipline had now been around for about a hundred years and the newer generation of younger geologists no longer felt like new kids on the block who could be pushed around so easily by the big physics bullies. They felt that 100 million years was as far as it was reasonable for them to go given their own methods of estimating the ages of geological features based on rates of formation and erosion and sedimentation. They dug in their heels and became more assertive, saying that the laws of geology were firmly enough established to rule out such a young Earth and boldly suggested that it was physics that had gone awry somewhere, even if they could not find fault in its calculations or point out where the problematic assumptions were.

Next: What about biology and natural selection?

(Main sources for this series of posts are The Chronologers’ Quest: The Search for the Age of the Earth (2006) by Patrick Wyse Jackson and Lord Kelvin and the age of the Earth by Joe D. Burchfield (1975).)

POST SCRIPT: If the shoe were on the other foot…

If there is one thing that The Daily Show is particularly good at it is showing how ridiculous something is by reversing roles.

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The age of the Earth-7: The Earth starts getting younger again

(My latest book God vs. Darwin: The War Between Evolution and Creationism in the Classroom has just been released and is now available through the usual outlets. You can order it from Amazon, Barnes and Noble, the publishers Rowman & Littlefield, and also through your local bookstores. For more on the book, see here. You can also listen to the podcast of the interview on WCPN 90.3 about the book.)

For previous posts in this series on the age of the Earth, see here.

Darwin and Wallace published their theory of natural selection at a time when it seemed that they had all the time they needed for their theory of natural selection to work. But that window of freedom of long geological times was soon to close and, starting around 1860, newer estimates of the age of the Earth started to shorten it considerably. Part of the reason was undoubtedly a backlash to the success of Darwin’s theory of evolution that, within a decade of the publication of Origins in 1859, had persuaded almost the entire scientific community that evolution was a fact and that its basic idea that all organisms arose from descent with modifications from common ancestors was true.
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The age of the Earth-5: Christianity tries to deal with an old Earth

(My latest book God vs. Darwin: The War Between Evolution and Creationism in the Classroom has just been released and is now available through the usual outlets. You can order it from Amazon, Barnes and Noble, the publishers Rowman & Littlefield, and also through your local bookstores. For more on the book, see here. You can also listen to the podcast of the interview on WCPN 90.3 about the book.)

For previous posts in this series on the age of the Earth, see here.

By the end of the 18th century, Enlightenment values had taken hold, science and rationality were on the rise, and religion could no longer rely on dogmatic assertions and threats alone to suppress ideas that it found unpalatable. So the strategy shifted to creating alternative narratives that had a scientific veneer that would make their religion-based conclusions more acceptable. That strategy has been the one that religions have followed ever since, right down to the present day, with intelligent design being its latest incarnation.
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The new religions, same as the old

(My latest book God vs. Darwin: The War Between Evolution and Creationism in the Classroom has just been released and is now available through the usual outlets. You can order it from Amazon, Barnes and Noble, the publishers Rowman & Littlefield, and also through your local bookstores. For more on the book, see here. You can also listen to the podcast of the interview on WCPN 90.3 about the book.)

In recent posts, I have been highlighting the absurdities of religions like Mormonism and Scientology. There is no end to such religious weirdness. There is in India right now a person who calls himself a God-man who has millions of devout and devoted followers, manyy rich and powerful, who visit his ashram and give him money. His name is Sai Baba and he is a household name in the Indian sub-continent. I personally know people who believe his claims that he is an incarnation of god and have tried to persuade me to believe in him too, although there are many serious allegations that he is a pedophile and using magic tricks to create the illusion of having godly powers. See this video of him getting caught using a trick.

People who value rationality and logic and scientific thinking can dismiss all these religions, old and new, as the products of fraud, excessive credulousness, superstition, and wishful thinking, without a shred of credible empirical evidence in support of them. But people who belong to one of these religions have a tougher time explaining why their own religion is more credible than the others. For an example of this, here’s what Jacob Weisberg wrote in Slate magazine during the last election when Mitt Romney (a Mormon) was still a candidate, trying to justify why he would not vote for a Mormon or Scientologist for president, while Jews and Christians were just fine with him:

One may object that all religious beliefs are irrational—what’s the difference between Smith’s “seer stone” and the virgin birth or the parting of the Red Sea? But Mormonism is different because it is based on such a transparent and recent fraud. It’s Scientology plus 125 years. Perhaps Christianity and Judaism are merely more venerable and poetic versions of the same. But a few eons makes a big difference. The world’s greater religions have had time to splinter, moderate, and turn their myths into metaphor.

In other words, Weisberg says that yes they may all be frauds, but at least the old religions (which conveniently includes his own) have had time to create elaborate justifications for their frauds. Weisberg, though hypocritical and self-serving, is actually right. The only reason that traditional religions are not subject to the same kind of scrutiny that new religions face is because they have long had an army of propagandists (who go by the label of theologians) whose job is to create vague rationalizations that believers can grab onto to convince themselves that what they believe is not utterly absurd. Theology should be defined as the discipline that makes absurd religious beliefs acceptable to people who want or need to believe.

The sophisticated theologians and the average Friday or Saturday or Sunday worshipper have almost nothing in common in terms of beliefs, though they may use a common vocabulary and holy book. Sophisticated theologians think that the beliefs of ordinary people are laughable but they don’t say so openly. Their rationalizations are aimed at persuading sophisticated believers. The belief of these people then reassures the ‘common’ believers that their religion must be believable since all these sophisticated people subscribe to it.

It is quite conceivable that in the future, once they have had sufficient time to get their act together, we will see sophisticated Scientology apologists defend their religion in the high manner of Christian apologists like Karen Armstrong, H. E. Baber, and John Haught (more on him in a future post) arguing that there are ‘deep truths’ buried in the religion that we silly atheists with our shallow preoccupations with trivial things like evidence and truth, and our childish insistence that things make logical sense, simply cannot appreciate.

Some droll commenters over at Why Evolution is True provide examples of the kinds of verbiage we might see in the future from Scientology apologists, once they get the hang of how theologians in the older religions operate.

The problem is that militant scientology-haters are ignorant of sophisticated sciento-theology. Real scientology is like poetry–it transcends the question of whether Xenu exists. Fundamentalist a-xenuists are just rehashing the long debunked dogma of logical positivism. But if they read some Quine and got more up to speed on their philosophy they’d see the error of their ways. It’s entirely possible for an individual to believe in both Xenu and the science of aerodynamics, so clearly there is no conflict between science and Scientology. (Commenter Wes)
…
All Scientologists understand that Xenu is in fact a symbolic metaphor for the ground of being in which we all seek meaning. Thetans are sophisticated representations of our own inner journey to understanding, and limn the boundaries of our inner/outer conflict. (Commenter Tulse)

Of course, ordinary believers will find such things preposterous because they want magical thinking. Sophisticated theological language is always aimed at the intelligentsia, to persuade them to stay on board and give the religion credibility in the eyes of the masses. As George Orwell said in his Notes on Nationalism (1945) albeit in a different context: “One has to belong to the intelligentsia to believe things like that: no ordinary man could be such a fool.”

POST SCRIPT: Scientology exposed

Scientologists are sensitive to questioning about their beliefs, perhaps because of a realization of how ridiculous it sounds and also because having that knowledge freely available lowers its sale price. Recently the spokesperson for Scientology Tommy Davis walked out of an interview with ABC News’s Martin Bashir when he was asked about the Xenu stuff. He later tried (unsuccessfully) to prevent the broadcast of the interview. Watch.

Commenter Eric pointed out an expose of Scientology by the St. Petersburg Times that revealed the take-no-prisoners attitude that the church uses against defectors and those that accuse it of abusive practices.

The age of the Earth-4: The strategy of religions in response to scientific advances

(My latest book God vs. Darwin: The War Between Evolution and Creationism in the Classroom has just been released and is now available through the usual outlets. You can order it from Amazon, Barnes and Noble, the publishers Rowman & Littlefield, and also through your local bookstores. For more on the book, see here. You can also listen to the podcast of the interview on WCPN 90.3 about the book.)

For previous posts in this series on the age of the Earth, see here.

The history of the science-religion conflict follows a standard pattern. Religions make claims that lie within the framework of science, saying those claims must be true because of their divine origin (because of revelation or religious texts). Then it fights any scientific advances that challenge those claims. Then when the evidence becomes too great and further opposition becomes ludicrous, they concede the point and retreat to a new line of defense. Then after some time has elapsed to allow people to forget its previous objections, religions argue that the very scientific discoveries that they once vigorously opposed now actually support their religious beliefs. They sometimes even go so far as to suggest that their religion actually predicted them. (The comic strip Jesus and Mo has something to say on this here, here, and here.)
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The age of the Earth-3: The Earth gets old again

(My latest book God vs. Darwin: The War Between Evolution and Creationism in the Classroom has just been released and is now available through the usual outlets. You can order it from Amazon, Barnes and Noble, the publishers Rowman & Littlefield, and also through your local bookstores. For more on the book, see here. You can also listen to the podcast of the interview on WCPN 90.3 about the book.)

For previous posts in this series on the age of the Earth, see here.

The Enlightenment brought with it the separation of scholarly thinking from religious dogma and this enabled scientists to think much more freely and broadly about all matters, including the age of the Earth.

As the desire for conformity with biblical estimates weakened, scientists started devising theories of the formation of the Earth and the universe and doing calculations that were not explicitly linked to Biblical theories. Immanuel Kant (1724-1793) and Pierre Laplace (1749-1847) created a new model of the universe, the nebular hypothesis, that said that stars and planets originated as clouds of gases. They used Newton’s laws of mechanics and his theory of gravitational attraction to explain the formation and evolution of the solar system.
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Scientology

(My latest book God vs. Darwin: The War Between Evolution and Creationism in the Classroom has just been released and is now available through the usual outlets. You can order it from Amazon, Barnes and Noble, the publishers Rowman & Littlefield, and also through your local bookstores. For more on the book, see here. You can also listen to the podcast of the interview on WCPN 90.3 about the book.)

If the rise of Mormonism in recent times is surprising, Scientology is even more so, since it came into being in just the last fifty years. I must emphasize again that the belief structure of Scientology is no more bizarre than that of Christianity or Islam or Mormonism or any other religion. What is surprising that it, like Mormonism, came into being at a time when people had easy access to the story of its founder, stories that had enough suspicious elements that should have made any reasonable person wary as to his bona fides.
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