My dog was licking my face this morning – as he often does in the morning. Many people refuse to let dogs lick their faces. Understandable. I am one of the apparently few people who allow it. There are a few exceptions when I don’t like it, such as right after my dog has eaten stinky dog food. Otherwise, he is a very healthy, tidy and gentle (and smallish) dog. His breath is barely noticeable.
Dog’s lick people’s faces for a number of possible reasons; these are nicely explained in several articles, such as:
But the proposed reason that most intrigues me is that it is a form of chemical communication. Dogs have such a sophisticated sense of smell that they can actually gather information (dog-like information) about people they are licking. Licking can also have a calming effect on licker and lickee (if you are not a fan of dogs licking your face you may disagree, so just pretend that you’re a dog for a moment).
According to this article:
“Scientists believe that the major source of people’s positive reactions to pets comes from oxytocin, a hormone whose many functions include stimulating social bonding, relaxation and trust, and easing stress. Research has shown that when humans interact with dogs, oxytocin levels increase in both species.”
Even more fascinating is a study that indicates that interacting with dogs can have health benefits for humans:
So, having a dog can reduce obesity? That is certainly new to me!
While my dog was licking my face and kicking up his oxytocin, and consequently making me release the same chemical into my bloodstream, I was thinking about how social animals regulate chemistry within their pack. (Similar with the visible/audible dimension: when my dog sends growling signals, I will sometimes get up and check out the window for intruders. He is modulating my behavior). So, I began to see more clearly how chemical exchange might be important for the cohesion of a group of social animals. I suspect there are many more chemicals involved in regulating the behaviors of pack animals – including humans.
And I realized that the orchestration of chemicals – not only in a single animal body – but among a group of animals – is largely invisible to us. But of course: chemicals are too small to see. They are molecules made of atoms. We experience their signaling effects as behaviors and notions. And we humans may have evolved such complex societal structures that we can hardly even recognize the chemical foundations of so much of our social behavior. This is the nature of emergence.
When a new level of emergence takes shape (for instance, when chemistry becomes complex enough to enable replication and variation and therefore genetic-based biology), new, larger structures take on their own agency and begin to regulate their sub-components in turn. Ancient chemistry didn’t just allow an apparatus to emerge that conveys information for replication (genetics); it also allowed a complex network of signaling between organelles, cells, organs, organisms, ecosystems, and societies. Each level gives rise (and gives way) to larger structures.
Emergence and Top-Down Effects
Emergence is a fascinating subject – not only because of the beauty of imagining simple components coming together to make a whole that is larger than the sum of its parts – but because that whole can attain autonomy; it can actually reach down and regulate those components that allowed it to come into existence in the first place. It’s possible that this top-down influence is an innate and necessary property of emergence.
If you are a fan of emergence, like me, you enjoy spinning narratives about how various levels of reality came into existence:
The name of this blog is “Nature->Brain->Technology” – which is a nod to three of the levels in that list.
Dawkins’ book, The Selfish Gene – triggered new insights on genetics – and some lively debates. Dawkins coined the term “meme”. And I suspect he may have had a sense that the title of the book itself could turn into a meme. It brought forth ideas about how genes are powerful agents that cause an upward cascade of effects, making us do what we do: from the perspective of the selfish gene, we humans are “lumbering robots” whose purpose is to simply ensure its replication. Everything else is an illusion of human purpose. But it may be more subtle than this. Are genes the only things that are “selfish”? Could there be a lower level of selfishness going on?
My new insight from building oxytocin with my dog is that there is another layer of emergence involved, which is more fundamental to genes, and which gave rise to genes. My insight was echoed by an article called “Forget the selfish gene — the evolution of life is driven by the selfish ribosome“, which states:
“The selfish ribosome model closes a big theoretical gap between, on the one hand, the simple biological molecules that can form on mud flats, oceanic thermal vents or via lightning, and on the other hand LUCA, or the Last Universal Common Ancestor, a single-celled organism.”
Anything that smells of Eve is suspect. It’s more likely that there was a sort of distributed “Eve Soup” with a lot of pseudo-replication happening over a very long period of time. It is possible that the origin of life cannot be pinpointed to a single time and space…specifically because it is emergent.
Besides face-licking, there are probably many more phenomena that we have low-dimensional explanations for. They may someday be revealed as the effects of various selfish agents operating on various levels. Emergence is a scientific tool – a conceptual framework – that helps reveal otherwise invisible forces in nature.
For instance: why do we yawn?
The physiological purpose of a yawn remains a mystery. “The real answer so far is we don’t really know why we yawn,”
It may be more productive to stop looking for “the purpose”, and to look at it through the wide lens of emergence.