I
itinerant1
Guest
I’ve noted some of your recent posts. You have been one busy lady. I think the difficulty might lie in the area of the concepts of species and human being.As I read research papers, I find that the reduction of the human being to physical substance alone is the unmentioned foundation for the description and/or the interpretation of research.
In the beginning of “Molecular Genetics of Speciation and Human Origins”, Francisco Ayala refers to human evolution. The unsuspecting reader could easily assume that Ayala is referring to humans as we know them. Toward the end, Ayala defines what he means by humans. He begins the section “Theories of Human Origins” with “The origin of anatomically modern humans, Homo sapiens sapiens, occurred around 200,000 years B.P.” He also refers to other theories regarding “the emergence of anatomically modern traits…” In other words, When Ayala refers to the evolution from H. erectus to archaic H. Sapiens, and later to anatomically modern humans, he is referring to material aspects only and not to the fully complete human person.
This raises the serious question: What is the point of origin of the fully complete human being. Since the data supporting large populations refer to the genomic structure leading to the anatomically modern humans, there is good reason to say that the paper is non-informative about the point of origin of the fully complete human being. Consequently, in my humble opinion, a statement that “no severe population bottleneck has occurred in human evolution” applies only to the human anatomy and not to the true nature of the human species; consequently, two sole parents of the human species is a real possibility.
Blessings,
granny
The quest for knowledge is worthy of the adventures of the journey.
Ayala’s concept of even modern humans, is inadequate in my view, since he considers human consciousness to an epiphenomenon.
We cannot determine exactly when hominisation occurred since it is not something open to scientific analysis.
Working from an essential definition of man as a rational animal, there is scientific evidence, i.e. from the kinds of tools found, etc. suggesting that true rationality pre-existed Homo sapiens sapiens. Hypothetically, we may be looking at the prospect of rational beings existing one and half to two million years BP. Where one draws the historical line is still open to argument. It is still a question in my mind, too.
“Species” is currently understood in the context of populations, and I believe population thinking assumes certain things about what a human is and the idea that a population acquires these characteristics not all at once.
I cannot discuss the genetic interpretation of evidence in any detail since I lack enough background to do so. But the notion of “species” still has problems, a fact once snidely conceded by the eminent Ernst Mayr.