In August 2024 I published a post entitled "Exhibit A That Developmental Biologists Have No Credible Explanation of Human Morphogenesis." I discussed an article in the online magazine Aeon by a molecular biologist (John Wallingford) who is the past president of the Society for Developmental Biology. I discussed how the article provided no credible tale to explain the marvel of how a speck-sized zygote (existing just after impregnation of a female) is able to progress to become the vast state of organization that is the human body. In November 2024 the same magazine (Aeon) published another article by different biologists trying to explain how this marvel of organization occurs. The article (entitled "Elusive But Everywhere") is by Duke University professor of biology Daniel W. McShea and Gunnar O. Babcock, a lecturer at Cornell University. The article by McShea and Babcock tells a completely different tale from the one told by Wallingford. McShea and Babcock very much fail to tell a credible tale to explain the marvel of human development.
The article begins with a few paragraphs of misleading claims such as the claim that Darwin did something to reduce the need for teleological explanations in biology. No, he didn't; but I need not get into the failures of Darwinism in this post, but to simply point out that the problem of explaining what happens in a womb is an almost entirely different problem from the problem of explaining the origin of the human species. Whatever ideas a person may have about so-called natural selection and the origin of humans are not of any use in explaining how a speck-sized zygote is able to progress over nine months to become something vastly more organized: a full human body. In trying to explain the "how" of human development, the problem is to explain how it could happen that some great marvel of construction could occur inside the body of a pregnant woman. Claims about events that happened thousands or millions of years ago are of no use in explaining such a thing. An explanation would have to involve describing events that are happening this year within the bodies of pregnant women.

McShea and Babcock discuss the failure of mechanistic explanations to explain the appearance of a human body. They then give this grand-sounding announcement:
"So, caught between modern science and our intuitions about teleology, we seem to have only two ways of explaining the apparent goal directedness in some systems: teleology or mechanism. Both are troublesome. Both are inadequate. In recognition of this problem, philosophers of biology and others have, in recent decades, been struggling to find an alternative. We believe we have found it: a third way that reconciles Aristotelian thinking about goal directedness with the mechanistic view of a Newtonian universe. This alternative explains the apparent seeking of all goal-directed entities, from developing acorns and migrating sea turtles to self-driving cars and human intentions. It proposes that a hidden architecture connects these entities. It even explains falling rocks.
We call it ‘field theory.' "
Unfortunately, what follows is nothing but the most empty hand-waving. No real theory is presented. All that the authors have done is to sprinkle a little physics jargon while engaging in the most vacuous hand-waving. The term 'field' is a term used by physicists. It refers to some area of space that is under the influence of a force.
McShea and Babcock state, "Our proposal is that fields direct the action of all goal-directed entities." They give us nothing specific to back up this wild claim, which makes no sense. In physics, fields are mindless things, things which do not contain any type of detailed instructions. A magnetic field does not tell how to make anything complex. But the human body is a marvel of the highest organization. In a body atoms are organized into not-very-complex molecules such as amino acids, which are organized into extremely complex molecules such as proteins, which are organized into far more organized protein complexes, which are organized into organelles, which are organized into cells, which are organized into tissues, which are organized into organs, which are organized into organs systems. How could you ever get such a marvel of organization from some mere field, which has no power to produce complex organizations, and no blueprint of the final state of organization to be achieved? Initially the idea of evoking "fields" to explain how we get human bodies seems as silly as the idea that some magnetic field built a skyscraper. McShea and Babcock do nothing to make the idea seem credible.
But at least the authors give us a little candor, in which they reject the false claims about a DNA body blueprint that have been told by so many lying developmental biologists in the past. Immediately correcting a false statement they make, McShea and Babcock state this:
"A more challenging case for field theory involves the development of embryos. To all appearances, embryos seek their adult form guided by internal genes, not an external field. Think of the fruit fly, Drosophila melanogaster, one of the most well-studied animals in scientific research. The mother fruit fly guides the earliest development of her growing embryos, but soon the process seems to proceed almost autonomously, as the embryo partitions itself into segments and then into body regions, with limbs, mouth, and other parts forming later. How does it do it? No information about the overall architecture of these body parts is present in the cells and tissues of the parts themselves, or in each organism’s genes. Once again, the answer requires looking outside."
The statement that "to all appearances, embryos seek their adult form guided by internal genes, not an external field" is not true, because genes have no specification of how to make a body or any of its cells. The authors correct that false statement later in the paragraph, by confessing "no information about the overall architecture of these body parts is present in the cells and tissues of the parts themselves, or in each organism’s genes."
The correct relation between DNA and the different levels of organization in a human body is illustrated in the diagram below. The black bar makes it clear that none of the seven most complex levels of organization is specified by DNA or genes.
Explaining the arising of 200 types of cells in the human body (none specified by DNA or its genes) is a problem exponentially harder than the average person realizes, partially because cells are exponentially more complex than the average person realizes. The very imperfect diagram below fails to adequately depict such complexity, but at least helps to correct some of the misimpressions of typical cell diagrams that make human cells look a million times simpler than they are.
The numbers in the diagram above are derived from a table on this page of the Human Protein Atlas. We see a list of the types of organelles in the cells of the human body, and how many types of proteins are needed to make up such organelles
Later in the Aeon article, we get a paragraph that shows the "there's no there there" nature of McShea and Babcock's explanation. They make it clear that they are not at all imagining some external force that directs human development, causing the huge marvel that is the construction of the human body. Instead they are merely using the term "fields" to describe something that is purely internal to the human body. They state this:
"Guidance is external, but not in the way you might think. It is not external to the entire embryo, but external to each body part. Guidance comes from ‘morphogenetic fields’ that are set up by the embryo itself. It is these fields that supply the cells contained within them with guidance about what to do: where to move, what to secrete, when to divide. These fields are composed of molecules, produced by genes deep inside an embryo’s cells, but the genes are not the source of guidance. They are just factories. And the molecules they manufacture combine to produce a chemical field around the growing body parts, directing their behaviour."
There is nothing here in the way of any kind of substantive explanation. All that we have is the same old bottom-up baloney of "molecules built you," with the addition of a little jargon borrowed from physics. So the idea that your body arose from low-level mechanistic effects is being repackaged a bit, with lots of use of the physics term "field." There's nothing substantive that is being added to the explanation. And when the authors appeal to "fields" that are "composed of molecules," it is clear that their attempt to sound like physicists has gone off the rails. The fields of physicists are not composed of molecules. This long article on "The Concept of a 'Field' in Physics" tells us, "Quite generally, a field is defined as some quantity which can vary continuously in some domain (usually in the domain of space and time)."
"Genes guide your body to reach its final form" is a lie. Genes are inert mindless chemicals that have no specification of how to build anything bigger than a protein molecule. "Genes help make fields that guide your body to reach its final form" is just a variation on that lie. In the world of physics, fields are mindless things that have no specification of how to build complex things. So it makes no sense to imagine "morphogenetic fields" guiding the human body to reach its vastly organized state.
In the final part of their article, McShea and Babcock take their hand-waving about fields into a different direction, speculating about fields generating mental effects in humans. Their speculation is all based on false ideas about the brain being the source of the human mind, an idea that is untenable because of many reasons explained in the posts of my blog here. The hand-waving of McShea and Babcock about fields controlling your mind is as vacuous and groundless as their talk about fields explaining the origin of human bodies during human development.
How do human bodies arise, given the nonexistence of any blueprint, recipe or specification for how to make a human body (or any of its organs, cells or organelles) in DNA or its genes? Our biologists have no credible tale to tell to explain this miracle of organization. What they mainly do is lie to us very badly, by telling us fictions such as the lie that your DNA is a body blueprint. Such a lie is a very childish lie, because even if the lie were true, it would not explain how there can arise a human body. That is because blueprints don't build things. Things get built with the help of blueprints when intelligent agents read blueprints to get ideas on how to build things.
There are many different versions of the "DNA is a body blueprint" lie, including the lie that genes "guide" or "direct" or "govern" the construction of a human body. Genes having no specification of a human body or any of its organs or cells cannot possibly be doing such a "guiding" or "directing" or "governing."
Other than lying about DNA and genes, what developmental biologists mainly do is engage in empty hand-waving. And that is pretty much all that is going on in the article of McShea and Babcock. The progression from a speck-sized zygote to the vast organization of the human body is a miracle of coordinated construction a thousand miles over the heads of biologists.
- "Yet while these are several examples of well-understood processes, our study of animal morphogenesis is really in its infancy." -- David Bilder and Saori L. Haigo1, "Expanding the Morphogenetic Repertoire: Perspectives from the Drosophila Egg."
- "Fundamentally, we have a poor understanding of how any internal organ forms." -- Timothy Saunders, developmental biologist (link).
- "An adult human body is made up of some 30 to 40 trillion cells, all of which stem from a single fertilized egg cell. The process by which the right cells appear to arrive in their right numbers at the right time at the right place -- development -- is only understood in the roughest of outlines." -- Five scientists (link).
- "Our understanding of how our organs form is still in its infancy" -- A research project abstract written by scientists (link).
- "Biochemistry cannot provide the spatial information needed to explain morphogenesis...Supracellular morphogenesis is mysterious...Nobody seems to understand the origin of biological and cellular order." -- Six medical authorities (link). "
- "Understanding the rules underlying organismal development is a major unsolved problem in biology. Each cell in a developing organism responds to signals in its local environment by dividing, excreting, consuming, or reorganizing, yet how these individual actions coordinate over a macroscopic number of cells to grow complex structures with exquisite functionality is unknown." - Five scientists (link).
- "However, our understanding of the molecular and physical basis of morphogenesis in plants or in any other eukaryotic system [e.g. mammals] is still in its infancy due to the complexity and non-linearity of processes involved in morphogenesis dynamics (or Morphodynamics)." -- A description of a 2017-2021 scientific project, presumably written by scientists (link).
- "Understanding morphogenesis in vertebrate tissues in development and disease poses one of the most significant challenges in the life sciences. Despite the impressive technical advances aimed at cellular and subcellular characterization and manipulation over the past half century, a clear picture of how form is created still remains in its infancy." -- Four scientists in 2025 (link).
- "We don't know what dark matter is, we don't understand how the brain works or consciousness, we don't understand morphogenesis, we don't understand the origin of life." -- Physics PhD Michael Nielsen (link).
- "You start off as a sperm and an egg, and nine months later [your body has been built], through a magical process of morphogenesis, which we don’t understand." -- Donald Hoffman, Professor Emeritus of Cognitive Sciences at the University of California, Irvine (link).
- "We take it for granted that we go to bed with two sets of fully functional kidneys and that we wake up with them the next morning but we don't understand the fundamental processes that give rise to this very well choreographed maintenance of an organism's form and function." -- Scientist Sanchéz Alvarado (link).





















