Notes
Outline
THE MAIN POINT!
OVERVIEW OF THE GENERAL THEORY OF EVOLUTION AS IT CONCERNS HUMAN HISTORY.
POINT OUT SOME STREGTHS AND WEAKNESSES THROUGH EVIDENCE.
Human History: evolution?
Here is a starter…listen, learn, study, then decide.
Why does it all matter, anyways???
Your beliefs shape your desires.
Your desires dictate your actions.
Do you ever act contrary to your desires?
Your actions shape the present and future. (remember for eugenics presentation)
Review of the General Theory of Evolution
Many of you asked what evolution is, anyways.
At least 5 types of evolution, so lets be specific.
In this class and in your textbook, we are speaking primarily about biological evolution, or the theory that the diversity of organisms we see today all came from one common ancestor, likely a single-celled organism.
Evolution draws heavily on natural selection and mutation for support
Phylogenetic Tree
(cladogram)
"Phylogenetic"
Phylogenetic
Tree for
Animals
One example of a Human Cladogram
Chimpanzees and Humans
An estimated 90-98% DNA similarity (depending on the methods used)
Consider: Humans have +/- 3 billion base pairs.
10% of 3 billion is 300 million base pairs.
2% of 3 billion is 60 million base pairs.
Consider: Pig heart valves are used to replace human heart valves. Chimpanzee valves are not used.
Slide 9
Human cladograms from the journal Science*
Why are there different cladograms?
There is confusion on the part of evolutionists because the evidence is fragmentary, subjective, and may be considered contradictory.
Fossil data is not the basis for the belief in evolution of apes to humans. The notion that man evolved from an ape-like ancestor came first, and there is an effort to make the data support that conclusion. Evolutionists are trying to come up with a scenario of how apes evolved into man that takes into account the fossil evidence.
The Experts Speak
“Evolution [is] a theory universally accepted not because it can be proven by logically coherent evidence to be true, but because the only alternative, special creation, is clearly incredible 1 ”
~D.M.S. Watson, biologist.
1 D.M.S. Watson, “Adaptation,” Nature, 124:233, 1929.
The Experts Speak
“At this point, it is necessary to reveal a little inside information about how scientists work, something the textbooks don’t usually tell you. The fact is that scientists are not really as objective and dispassionate in their work as they would like you to think. Most scientists first get their ideas about how the world works not through rigorously logical processes but through hunches and wild guesses…
The Experts Speak
   …As individuals, they often come to believe something to be true long before they assemble the hard evidence that will convince somebody else that it is. Motivated by faith in his own ideas and a desire for acceptance by his peers, a scientist will labor for years knowing in his heart that his theory is correct but devising experiment after experiment whose results he hopes will support his position.2 ”
~Boyce Rensberger, science author (Washington Post, New York Times), university lecturer (Johns Hopkins Univ.), and Director of Knight Science Journalism Fellowships Program, MIT
The Experts Speak
“We take the side of science in spite of the patent absurdity of some of its constructs, in spite of its failure to fulfill many of its extravagant promises of health and life, is spite of the tolerance of the scientific community for unsubstantiated just-so stories, because we have a prior commitment to materialism…
"“…It is not that..."
“…It is not that the methods and institutions of science somehow compel us to accept a material explanation of the phenomenal world, but, on the contrary, that we are forced by our a priori adherence to material causes to create an apparatus of investigation and a set of concepts that produce material explanations, no matter how counter-intuitive, no matter how mystifying to the uninitiated. Moreover, that materialism is an absolute, for we cannot allow a Divine Foot in the door.3”
~Richard Lewontin, American evolutionary biologist, geneticist, professor (NCSU, U. of Chicago, Harvard), researcher (Harvard)
3 Richard Lewontin, “Billions and Billions of Demons,” The New York Review, January 9, 1997, p. 31.
Slide 17
Australopithecus afarensis: human ancestor or chimpanzee?
Slide 19
A new theory states that the genus Australopithecus is not the root of the human race… The results arrived at by the only woman authorized to examine St W573 are different from the normal theories regarding mankind's ancestors: this destroys the hominid family tree. Large primates, considered the ancestors of man, have been removed from the equation of this family tree… Australopithecus and Homo (human) species do not appear on the same branch. Man's direct ancestors are still waiting to be discovered.188
Slide 21
Homo habilis
Slide 23
Homo (Ergaster) erectus
Homo erectus and a native Malaysian.
…and Neanderthals? Neanderthals demonstrate no more variation than can be seen today in homo sapiens.
What about Neanderthals?
A prominent authority on the subject, Erik Trinkaus, a paleoanthropologist from New Mexico University, writes:
“Detailed comparisons of Neanderthal skeletal remains with those of modern humans have shown that there is nothing in Neanderthal anatomy that conclusively indicates locomotor, manipulative, intellectual, or linguistic abilities inferior to those of modern humans. 1 ”
1Erik Trinkaus, "Hard Times Among the Neanderthals," Natural History, vol. 87, December 1978, p. 10
See also: R. L. Holloway, "The Neanderthal Brain: What Was Primitive," American Journal of Physical Anthropology Supplement, vol. 12, 1991, p. 94.
Neanderthal tools…a bone flute and sewing needle.
Neanderthal Models
More Varieties of Humans
More Varieties of Humans
More Varieties of Humans
More Varieties of Humans
More Varieties of Humans
More Varieties of Humans
More Varieties of Humans
More Varieties of Humans
More Varieties of Humans
We see variety in other species, too.
Skulls of two domestic dogs, a coyote, and a wolf.
More variety…
Let’s sum it all up together.