The authors begin their discussion by providing two quotes they feel portray the conventional wisdom on this topic. Again, the authors overstate their case. They were lined up along the top of the grave and shot so that they fell into it. Groups of humans that master agriculture will not only be better fed, but they will have enough surplus to devote to increasing the complexity of their civilization as well as having different immune systems due to contact with livestock and other animals.
First, there is reason to believe that violence became less common with the growth of government power over the last few thousand years, just as farmers discourage fighting among their livestock by dehorning, castration, and breeding for tameness.
The grave was near some woods. Therefore they had arisen through the same cause, and all could not be due to natural selection. Harpending and Cochran advance a deterministic, mechanistic view of the complex reality of human existence. In Chap 5 the authors talk much about gene flow. In their opinion, not only did evolution continue, but it has accelerated since humans left Africa and continues in the present day.
Harpending and Cochran proffer the notion of a rapid genetic change causing the innovations, but even if these as Klein says took place in Africa first, they only present a bare outline of vague data with little precision. How come these same lactose intolerant Asiatics post higher IQs more intelligent per HBD data and models than alleged European "role models"?
I argued, no doubt with some slurring of words, that that the increase in the complexity of life meant that there were more and more things for evolution to operate on, and that therefore evolution was speeding up. Since there are more calories from milk than from the meat of the slaughtered cows, these early humans evolved to tolerate milk.
It implies that Europeans had been dark-skinned for tens of thousands of years. Yes humans have had gene flow over the millennia. Farmers they assert on page are more selfish. But in some groups, mutations that caused continued lactase production were favored and eventually became common.
Ironically, the authors themselves subscribe to "conventional wisdom" of a great "innovations bustin forth all over" when they argue that the Paleolithic cultural explosion is due to some sort of dramatic biological change in Chapter 2. If this an attempt to connect bigger brains with Neanderthals, which in turn link to modern humans it fails dismally- both in logic and data.
The people in place then were more like the dreaded tropical Africans. I shall never forget the scene throughout my life. Culture can shape genetics. Microcephalin MCPH1 regulates brain size, and has evolved under strong positive selection in the human evolutionary lineage.
Many children were hit four or five times before they died. The introduction of a new food crop while seemingly a small localized matter, could also trigger massive social changes- the potato for example as introduced and developed in parts of Europe.
More people will have more mutationsthereby increasing opportunity for evolutionary change under natural selection. As favorable alleles go, 25 percent is a very large advantage, although not unprecedented.
In addition, of course, selection pressures changed once farming was adopted, favouring distinctive adaptations in different geographic areas. Enclosure of the commons is a relatively recent phenomenon for example.
But some gene variants provide biological advantages and are adaptive. Infectious diseases were another consequence of the early urban populations and soon became a new source of selection pressures. Certainly nothing in an acknowledgement that some groups might have a higher mean IQ than others implies any kind of justification for racist policies any more than acknowledging that an individual might have a higher IQ than another does.*The 10, Year Explosion* outlines the possibilities in detail.
In a more general vein, the authors offer that agriculture might have sped up evolution, not resulted in its end. This seemingly counterintuitive claim on the face of it is eminently logical upon further inspection, and in fact has some empirical support.5/5.
Chapter 3 of Gregory Cochran and Henry Harpending’s The 10, Year Explosion: How Civilization Accelerated Human Evolution () is called the “Agriculture: The Big Change,” and examines the evolutionary impact of.
The 10, Year Explosion: How Civilization Accelerated Human Evolution is a book by anthropologists Gregory Cochran and Henry Harpending. Starting with their own take on the conventional wisdom that the evolutionary process stopped when modern humans appeared, the authors explain the genetic basis of their view that human evolution.
The 10, year explosion: how civilization accelerated human evolution / Gregory Cochran and Henry Harpending. p. cm. Includes bibliographical references and index. Mar 08, · Chapter 1 lays out their claim of bucking conventional wisdom among scientists, who it is claimed, hold to a static picture of humanity in that a "Great Leap Forward" in cultural evolution that marked the end of evolution some 40, to 50, years ago in Europe.
The year anniversary of Charles Darwin’s seminal book on evolution, “The Origin of the Species,” is an appropriate time for an important expansion on his ideas. This has come in the form of “The 10, Year Explosion” by Gregory Cochran and.Download