Your examples, Dark Archon, were adequate. I fully agree with the possibility of the scenarios you mentioned, but have to point out why they do not actually contradict my suspicion.
1. The Neanderthals were a borderline case. And even there, knowledge and technology was more involved than you expect.
It was an early stage of development when sentience exists, but genetic evolution has not slowed yet. A stage where social evolution has not accumulated much knowledge (written language was still millennia away in future) and technical evolution has not fully started.
Yet even in spite of these factors, they did not really compete with genes. Genes were involved. But if they compteted, they competed with technology (weapons for fighting and hunting, tools for building) or social efficiency (teaching and learning the skills needed for success).
They competed in ways characteristic of sentient beings. In competition between sentients, technology and thought go first. Genes come later. They participate, but their relevance has been reduced and their evolution dramatically slowed. Genetic evolution has become just a subset of evolution.
Hence we may actually say that the case of Neanderthals supports my claim. If they did compete against
Homo sapiens, that was not genetic competition. Genetic differences between them and our ancestors was negligible. You might meet
Homo nenderthalis on the street and not notice the difference.
In fact, several researchers have speculated whether the Neanderthals really went like they are believed to. They might have just as easily merged with with our species, been assimilated in a population which grew more rapidly -- not due to genes, but due to technology and societies. They might have become us, because genes were not the real border between
Homo sapiens and
Homo neanderthalis.
2. Sickle-cell anemia is beyond my claim. It is an exception which occurs in areas of insufficient medicine, lacking malaria control and usually great poverty.
I made no attempt to exclude disease and disaster from factors influencing sentient evolution. They do influence us. Our evolution keeps us in balance with the various viruses, bacteria, smaller and larger parasites. But even that process is visibly slowing.
In conditions with access to healing technologies, we never leave our bodies/genes to fight on their own. We use medical intervention which usually decides the matter -- and is a product of social evolution (knowledge and experience needed for practising medicine) and technical evolution (means of treatment needed to defeat diseases).
Hence the occurrence and results of sickle-cell anemia do not contradict the concept of genetic evolution being overtaken by cognitive and technical evolution.
<BLOCKQUOTE><font size="1" face="Verdana, arial">quote:</font><HR>To take an example from B5. The 6 billion inhabitants of Corianna 6 were sentient, I believe. Yet the Vorlons were about to destroy the planet and cause the extinction of their race.<HR></BLOCKQUOTE>
A battle of ideas between the Vorlons and Shadows. Both were so far outside the genetic game that they could modify their genes and choose their abilities.
As for the people of Coriana, it was a battle of weapons between opponents of unequal technology. Clearly not a battle of genes, or a display of genetically powered evulotion. On the very contrary, an example of genetic evolution being determined by social and technical change.
<BLOCKQUOTE><font size="1" face="Verdana, arial">quote:</font><HR>In short, I believe that evolution by natural selection occurs whether sentience is their or not.<HR></BLOCKQUOTE>
I agree partly. It never fully stops. But it tremendously slows, and loses its self-directing nature. After a certain level of knowledge and technology has been reached, genes no longer direct. They follow. They cease being *the* deciding factor.
Sentient beings are characterized by their capability for understanding and purposeful action. Understanding and purposeful action eventually drag the genes with them. The question no longer is "who you are". You become who you want to become.
In case of non-sentient creatures, genes are the main factor. They compete and choose the way. As our species became sentient and started it gradual accumulation of understanding and technology, genes became less and less relevant. They are still relevant. But if logic is to be trusted, in the future they lose much of their meaning. If our kind reaches that future and learns to live with the technologies we create.
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To sum it up, the third principle of sentient life is too narrow in definition. Evolution favours efficiency. Sentient beings can choose what is efficient.
[This message has been edited by Lennier (edited February 26, 2002).]