beyondtimeandspace said:
IMO, it holds merit. However, I am also an advocate of Evolutionary Theory (not of the Darwinian sense, however).
I tried to argue above the way that the Darwinian theory of Evolution by Natural Selection is the natural, logical outcome; of the
fact that development of life is based on the contents of ones genes, that genetic copying is subject to error in the copying process, that some "errors" would in fact be better for the new organism than the old one, that the implacable force of Death would eliminate mutations which caused detrimental effects more of the unmutated than those with the beneficial mutation (after all a beneficial mutation is simply one that is better at avoiding death, so the beneficial ones are
de facto the ones you are left with).
After Darwin, there were a variety of different theories of
mechanism, but nearly 150 years later it is still Darwin that rules supreme. One early theory was "mutationism", which assumed that the direction of evolution was forced by mutation in some way, but this actually has semi-mystical elements and rapidly fell away. Some modern theories regarding the evolution of species such as neutralism and the theory of punctuated equilibria are depicted in the media as "anti-Darwinian", but in fact they are not, and Darwin had scarcely a greater champion than one of the co-authors of that theory, the late Stephen Jay Gould.
The way that anti-Darwinians depict the theory of evolution is almost as if the process of Natural Selection is some devious anti-God that scientists postulate as responsible for the development of species for the express purpose of denying the existence of God. It's not like that. It is simply a natural outcome of the life processes that we see. Species exist in populations, they compete with other species and with the environment, genes offer the opportunity for variation and change and hovering over the whole is the quite unavoidable spectre of Death. The large number of individual creatures in a species population (up to billions in the case of insects, for example), multiplied by the number of births in a year (almost as many in the case of some species), multiplied by the number of years possible for this entire process to take place (at a conservative estimate, about a billion), means that what would otherwise be low probability individual events start to actually dominate the outcome - it's a numbers game.
If you postulated any kind of entity (which wouldn't have to be alive, you could do it with computer sprites) which reproduced with errors, and those errors had some effect on whether the next entity would exist long enough to reproduce or not, and postulated enough numbers of these entities and reproduction events and enough time, evolution would take place and the entities at the end of that time would seem utterly different from the ones at the start (which might only be a single pixel). Because of this, Richard Dawkins has postulated about what we might discover about an alien species, were we to ever meet one. There's no particular reason that an alien life form would be carbon-based, as we are, would involve proteins, enzymes or amino acids as ours does, would have its reproduction mechanism based on deoxyribonucleic acid as ours does - who knows the infinite varieties of Chemistry, after all? But, he said, whatever the chemical basis for the life, the
complexity of it will have evolved through Darwinian processes.