Tag Archives: Darwinism

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520 million year old shrimp heart is more complex than those of today

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First, the straight story on the scientific discovery, as reported in Bioscience Technology.

Excerpt:

520 million years ago, the first known animal heart was formed.

It was the heart of an ancient shrimp, and quite a heart it was. For it, and its vascular system, have been found to be more complex than that of modern shrimp, researchers reported in a recent Nature Communications. Its cardiovascular system was apparently one of evolution’s first templates for modern cardiovascular systems. Significant streamlining has occurred since.

The find comes on the heels of an equally important one by the same group: that of a stunningly intact nervous system from the same breed of primordial shrimp: Fuxianhuia protensa.

“This is only the second case of the description of a cardiovascular system in a Cambrian arthropod, the first one being that of the inch-long Marrella from Burgess Shale,” emailed Diego Garcia-Bellido of the University of Adelaide, who co-discovered that first arthropod while at the University of Cambridge. Garcia-Bellido was not involved in the new study. “This new finding of a cardiovascular system in a larger animal (Fuxianhuia is about two to three times as large, thus more detail), together with a fantastically preserved, and very complex, nervous system, unknown in Marrella, and the gut, make it probably the most complete arthropod internal anatomy known in the fossil record.”

The main conclusion drawn, said Garcia-Bellido: “The level of complexity of the Fuxianhuia was extremely high, considering that we are studying some of the oldest animals on Earth.”

Now, if you’re like me, you’re skeptical that soft tissues can be preserved in the fossil record, but:

Said the paleontologist via email: “As we know, most soft tissue of animals tends to decay away once the animals died, so often only the hard parts of animal body (bones, shells, teeth, etc.) are preserved in fossils. However, under very exceptional circumstances, soft tissue and anatomical organ system can also be preserved in fossils.”

Keep in mind that 520 mya is right after the Cambrian explosion that intelligent design people like me love to talk about. I mean you are going from single-celled life to complex organ types in a few million years. Fine if you are an ID proponent, but devastating if you are a Darwinian naturalist.

Cambrian Explosion
The Cambrian Explosion: the origin of phyla

If you are a naturalist, then you need the fossil record to go from simple to complex. The trouble is that all the simple to complex in that image is pure speculation at this point – and not for lack of trying, either.

You know, I am writing this on Saturday night, and in a happier world, this discovery would be discussed tomorrow in every Christian church in the land. This is the kind of data that Christians should be familiar with to check the presupposition of naturalism which is lethal to rational thought. If only we were more focused on truth than on signing and feelings in church. If only we were not so scared of traditional dating of fossils. Maybe then we would be getting somewhere in the culture wars.

Polemics

Theistic evolutionists and the two-platoon strategy

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What should we make of theistic evolutionists telling us that you can believe in God, while still knowing that matter, law and chance explain the full development of all of life?

Consider this quotation from Phillip E. Johnson.

Quote:

The National Academy’s way of dealing with the religious implications of evolution is akin to the two-platoon system in American football. When the leading figures of evolutionary science feel free to say what they really believe, writers such as Edward O. Wilson, Richard Dawkins, Daniel Dennett, Carl Sagan, Steven Pinker, Stephen Jay Gould, Richard Lewontin and others state the “God is dead” thesis aggressively, invoking the authority of science to silence any theistic protest. That is the offensive platoon, and the National Academy never raises any objection to its promoting this worldview.

At other times, however, the scientific elite has to protect the teaching of the “fact of evolution” from objections by religious conservatives who know what the offensive platoon is saying and who argue that the science educators are insinuating a worldview that goes far beyond the data. When the objectors are too numerous or influential to be ignored, the defensive platoon takes the field. That is when we read those spin-doctored reassurances saying that many scientists are religious (in some sense), that science does not claim to have proved that God does not exist (but merely that he does not affect the natural world), and that science and religion are separate realms which should never be mixed (unless it is the materialists who are doing the mixing). Once the defensive platoon has done its job it leaves the field, and the offensive platoon goes right back to telling the public that science has shown that “God” is permanently out of business. (The Wedge of Truth, IVP 2000, pp. 88-89).

So what naturalistic scientists believe is that God didn’t do anything to create the diversity of life – that nature does all of its own creating. In fact, it doesn’t matter if the best naturalistic explanation is improbable or implausible – scientists must bitterly cling to materialistic explanations of natural phenomena.

The problem for these scientists is that they are taxpayer-funded, and religious people don’t like paying to have scientists shoehorn reality into a pre-supposed naturalistic framework. Sometimes, religious people get annoyed about being told that sparking gases can create functional proteins. And sometimes, religious people get annoyed about being told that the universe oscillates eternally despite observations that falsify that speculative theory. And sometimes, religious people get annoyed about being told that there are as yet undiscovered fossilized precusors to the Cambrian era fossils.

Naturalists think that opposition to these lame naturalistic theories only ever be religiously-motivated. They cannot accept that people might question their naturalistic just-so stories on scientific grounds. So what do the naturalists do when faced with scientifically-motivated dissent that they think is religiously motivated? Well, they trot out “religious” scientists. These “religious” scientists claim to have a deep personal faith in God, and a belief in miracles. But these religious scientists believe that what actually happened is that law, matter and chance did all the creating of life. This is the “second platoon”. They are sent out to mislead the public by talking about their personal faith, and what God could and couldn’t do, and how evolutionists can believe in God without any evidence of intelligent causes in the history of life. The one question they most want to avoid is whether science, done in the ordinary naturalistic way, can discover evidence of intelligent agency in the history of the development of life.

Now, take a look at this article by Jay Richards. He cites some theistic evolutionists.

Excerpt:

Biologist Ken Miller:

For his part, [Ken] Miller, a biologist, has no qualms about telling us what God would do: “And in Catholicism, he said, God wouldn’t micromanage that way. ‘Surely he can set things up without having to violate his own laws.'”

I am unaware of any tenet of Catholic theology that requires God not to micromanage. It is, however, a tenet of deism.

Got that? What really happened is that God didn’t do anything. How does he know that? From the science? No. Because he assumes naturalism. Oh, it’s true that he says that God is lurking somewhere behind the material processes that created life. But God’s agency is undetectable by the methods of science. And he is hoping that you will accept his subjective pious God-talk as proof that a fundamentally atheistic reality is somehow reconcilable with a robust conception of theism.

More from Richards:

Then we get Stephen Barr offering his private definition of “chance.”

It is possible to believe simultaneously in a world that is shaped by chance and one following a divine plan. “God is in charge and there’s a lot of accident,” said Barr, also a Catholic. “It’s all part of a plan. . . . God may have known where every molecule was going to move.”

What does Barr really believe? He believes that what science shows is that nature created life without any interference by an intelligent agent. Barr then offers believers his subjective pious God-talk to reassure them that evolution is compatible with religion. He has a personal belief – NOT BASED ON SCIENCE – that the material processes that created all of life are “all part of a plan”. He cannot demonstrate that from science – it’s his faith commitment. And more speculations: “God may have known…”. He can’t demonstrate that God did know anything from science. He is just offering a personal opinion about what God “could have” done. The purpose of these subjective opinions is to appease those who ask questions about what natural mechanisms can really create. Can natural causes really account for the development of functional proteins? Never mind that – look at my shiny spiritual-sounding testimony!

That’s theistic evolution. What really happened is that no intelligent causes are needed to explain life. What they say is “God could” and “God might” and “I believe” and “I attend this church” and “I received a Christian award” and “I believe in miracles too”. None of these religious opinions and speculations are scientifically knowable – they are just opinions, speculations and biographical trivia. Atheists and theistic evolutions agree on what science shows about the diversity of life – intelligent causes didn’t do anything.

The quickest way to disarm a theistic evolutionist is to refuse to talk about religion or God, and to ask them to show you the naturalistic explanation of the Big Bang. And the naturalistic explanation of the fine-tuning. And the naturalistic explanation of the origin of life. And the naturalistic explanation of the Cambrian explosion. And so on. Focus on the science – don’t let them turn the conversation to their personal beliefs, or to the Bible, or to religion, or to philosophy. Ask them what they can show in the lab. If naturalistic mechanisms can do all the creating they say it can do, let’s see the demonstration in the lab.

Polemics

Mark D. Linville: does Darwinian evolution make morality rational?

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Have you ever heard an atheist tell you that naturalistic evolution is an answer to the moral argument? I have. And I found a good reply to this challenge in the book “Contending With Christianity’s Critics“. The chapter that responds to the challenge is authored by Dr. Mark D. Linville. It is only 13 pages long. I have a link to the PDF at the bottom of this post.

First, a bit about the author:

Blog: The Tavern at the End of the World
Current positions:

  • PhD Research Fellow
  • Tutoring Fellow in Philosophy

Education:

  • PhD in Philosophy with a minor in South Asian Studies and a specialization in Philosophy of Religion, University of Wisconsin-Madison
  • MA in Philosophy, University of Wisconsin-Madison
  • MA in Philosophy of Religion, Trinity Evangelical Divinity School
  • MA in Theology, Cincinnati Christian Seminary
  • BA in Biblical Studies, Florida Christian College

Here is his thesis of the essay:

Darwin’s account of the origins of human morality is at once elegant, ingenious, and, I shall argue, woefully inadequate. In particular, that account, on its standard interpretation, does not explain morality, but, rather, explains it away . We learn from Darwin not how there could be objective moral facts, but how we could have come to believe—perhaps erroneously—that there are.

Further, the naturalist, who does not believe that there is such a personal being as God, is in principle committed to Darwinism, including a Darwinian account of the basic contours of human moral psychology. I’ll use the term evolutionary naturalism to refer to this combination of naturalism and Darwinism. And so the naturalist is saddled with a view that explains morality away. Whatever reason we have for believing in moral facts is also a reason for thinking naturalism is false. I conclude the essay with a brief account of a theistic conception of morality, and argue that the theist is in a better position to affirm the objectivity of morality.

And here’s a sample to get your attention:

But even if we are assured that a “normal” person will be prompted by the social instincts and that those instincts are typically flanked and reinforced by a set of moral emotions, we still do not have a truly normative account of moral obligation. There is nothing in Darwin’s own account to indicate that the ensuing sense of guilt—a guilty feeling—is indicative of actual moral guilt resulting from the violation of an objective moral law. The revenge taken by one’s own conscience amounts to a sort of second-order propensity to feel a certain way given one’s past relation to conflicting first-order propensities (e.g., the father’s impulse to save his child versus his impulse to save himself). Unless we import normative considerations from some other source, it seems that, whether it is a first or second-order inclination,one’s being prompted by it is more readily understood as a descriptive feature of one’s own psychology than material for a normative assessment of one’s behavior or character. And, assuming that there is anything to this observation, an ascent into even higher levels of propensities (“I feel guilty for not having felt guilty for not being remorseful over not obeying my social instincts…”) introduces nothing of normative import. Suppose you encounter a man who neither feels the pull of social, paternal or familial instincts nor is in the least bit concerned over his apparent lack of conscience. What, from a strictly Darwinian perspective, can one say to him that is of any serious moral import? “You are not moved to action by the impulses that move most of us.” Right. So?

The problem afflicts contemporary construals of an evolutionary account of human morality. Consider Michael Shermer’s explanation for the evolution of a moral sense—the “science of good and evil.” He explains,

By a moral sense, I mean a moral feeling or emotion generated by actions. For example, positive emotions such as righteousness and pride are experienced as the psychological feeling of doing “good.” These moral emotions likely evolved out of behaviors that were reinforced as being good either for the individual or for the group.2

Shermer goes on to compare such moral emotions to other emotions and sensations that are universally experienced, such as hunger and the sexual urge. He then addresses the question of moral motivation.

In this evolutionary theory of morality, asking “Why should we be moral?” is like asking “Why should we be hungry?” or “Why should we be horny?” For that matter, we could ask, “Why should we be jealous?” or “Why should we fall in love?” The answer is that it is as much a part of human nature to be moral as it is to be hungry, horny, jealous, and in love.3

Thus, according to Shermer, given an evolutionary account, such a question is simply a non-starter. Moral motivation is a given as it is wired in as one of our basic drives. Of course, one might point out that Shermer’s “moral emotions” often do need encouragement in a way that, say, “horniness,” does not. More importantly, Shermer apparently fails to notice that if asking “Why should I be moral?” is like asking, “Why should I be horny?” then asserting, “You ought to be moral” is like asserting, “You ought to be horny.” As goes the interrogative, so goes the imperative. But if the latter seems out of place, then, on Shermer’s view, so is the former.

One might thus observe that if morality is anything at all, it is irreducibly normative in nature. But the Darwinian account winds up reducing morality to descriptive features of human psychology. Like the libido, either the moral sense is present and active or it is not. If it is, then we might expect one to behave accordingly. If not, why, then, as a famous blues man once put it, “the boogie woogie just ain’t in me.” And so the resulting “morality” is that in name only.

In light of such considerations, it is tempting to conclude with C. S. Lewis that, if the naturalist remembered his philosophy out of school, he would recognize that any claim to the effect that “I ought” is on a par with “I itch,” in that it is nothing more than a descriptive piece of autobiography with no essential reference to any actual obligations.

When it comes to morality, we are not interested in mere descriptions of behavior. We want to know about prescriptions of behavior, and whether why we should care about following those prescriptions. We are interested in what grounds our sense of moral obligation in reality. What underwrites our sense of moral obligation? If it is just rooted in feelings, then why should we obey our moral sense when obeying it goes against out self-interest? Feelings are subjective things, and doing the right thing in a real objective state of affairs requires more than just feelings. There has to be a real objective state of affairs that makes it rational for us to do the right thing, even when the right thing is against our own self-interest. That’s what morality is – objective moral obligations overriding subjective feelings. I wouldn’t trust someone to be moral if it were just based on their feelings.

The PDF is right here for downloading, with the permission of the author.