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Developmental Delay as the Primary Cause of the Unusual Material Culture Among Humans Essay
Developmental Delay as the Primary Cause of the Unusual Material Culture Among Humans Essay
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What makes human beings unique among all the creatures of the earth? It sounds like almost a biblical question. But did you know that many in the scientific community are still asking that question? This query has built into it a very big assumption: that we are somehow more “special” than any other animal. Are we? What are they basing that on?
We are not the only animal that builds things. We are not the only animal that uses tools, or even that uses other tools to make tools. We are not the only animal with a communication system. We are not the only animal to compose music. We are not the only animal that thinks.
When it comes right down to it, there is nothing that anybody can point to to suggest that we are all that different from other animals, besides the all-prevasive material culture that humans are known for.
So why is it that, even though we are not the only animal on the planet to build and make things, we do seem to be the only one to build and make things that are not easily biodegradable and that therefore outlast not just the individuals who built them, but the entire civilizations from which they arose? This, I think, is a question worth addressing.
Neoteny in non-humans and in humans: A Permanent Developmental Delay
What is developmental delay and why do I think it is responsible for our unusual fixation on the permanence of material objects that we have made? Isn’t the term “developmental delay” just a new phrase to replace the politically incorrect “mental retardation”? Isn’t someone who is developmentally delayed essentially a moron?
Well, no! But thanks for asking. The word “moron” is a technical term to describe a person with an unusually low IQ. “Mental retardation”, when the term was first introduced, was meant to refer not to a person’s absolute intelligence, but to the relative degree to which their mental abilities are behind the average developmental level for their age group. So a “mentally retarded” person at three years of age may just be behind others in that age group, and may later catch up with and even surpass others.
Unlike mental retardation, “developmental delay” refers to all kinds of abilities and skills, not merely what we narrowly term intelligence. It can include motor skills, balance, the ability to stand on our own two feet, to survey the scene and draw conclusions about a situation and to respond non-verbally to social cues and any number of other skills not measured in an IQ test.
The fact of the matter is that all human beings, even the most “normal”, are developmentally delayed at birth compared to most other mammals of the same age. Not only that, but if you really look closely, most of us never catch up. We are never as graceful as a gazelle, and we are never as self-sufficient as a wolf, and even the most wily politician among us does not have the innate social skills of the average chimpanzee for forming coalitions in a peer group. We are slow to learn and slow to automate the skills that we have learned.
Humans suffer from extreme neoteny. This means that even when we are adults, we look and behave much like juveniles. We never really grow up, and as a result we continue to learn throughout life, and we continue to play with toys long after that stage of development is outgrown in other species.
Read also: Geography Through Food
Mammalian Developmental Delay: The Invention of Childhood
In order not to single humans out unduly, let’s keep in mind that mammals and birds are already somewhat developmentally delayed compared to most fish, reptiles and amphibians. While reptiles and fish and the other life forms that resemble them are not usually involved in caring for young, birds and mammals dedicate a portion of their life to provisioning helpless, underdeveloped and developmentally delayed offspring.
The downside of this arrangement is that adults are burdened with the care of parasitic young. The upside is that since the young are not prewired to know everything they need to know at birth, there is room for learning from experience, and birds and mammals have the opportunity to develop their intelligence throughout their childhood.
The prototypical mamalian child has a big head and a small body, engages in activities that serve no useful purpose (otherwise known as play), and is full of curiosity about the world and how it works.
By the time a typical mammal arrives at adulthood, there is much less play, and a serious interest in staying alive, getting food, procreating and caring for young pushes aside the pastimes of infancy and childhood.
In order to survive, an adult has to live in the moment and to consider those things that threaten survival. Anything beyond is a luxury reserved to growing children.
Read more: The First Nations 102: Understanding a Culture
Comparison between Chimpanzees and Humans
Humans and chimpanzees are very closely related. The retarded maturation in both species is quite pronounced compared to that of many other mammals. Chimpanzee young, like the children of hunter-gatherer humans, are carried about by their mothers and suckled for the first three years of life, and are often still being carried until they are five years of age. They do not enter puberty until sometime between eight and ten years of age, and even then they are not fully mature and do not become adults until their late teens. In the wild, a chimpanzee lives to be about forty, which is similar to the human survival under natural conditions without modern comforts. In captivitiy chimpanzees can live to be seventy-five or older.
However, despite these similarities, development in humans is even more delayed than in chimpanzees. A chimpanzee can support its full weight at birth. Carried by the mother, it clings with its strong arms to her hair. Social awareness and sense of balance develop months sooner in a chimpanzee than in a human.
Compared to a chimpanzee, a human child, even the most normally developing one, appears a little bit autistic. Physical coordination as well as social development are considerably delayed in humans, behind the normal timetable for chimpanzee maturation.
