Excellent -- some points I hadn't considered.
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that survived because we "tampered" with natural selection >>
We have already tampered with natural selection!! Don't you see it?? In all likelihood, my wife would have died at an early age had she been born in the 1800's. Her immune system is rather weak, and she is prone to sickness -- primarily due to a less than perfect thyroid gland. So, previously she would be removed from the gene pool, and the genetic code which predisposed her to sickness would be gone, too. Fortunately for me and the rest of the world, modern science (antibiotics in particular) kept her alive long enough for her body to adapt a bit better and to survive. Now, it seems that in order to maintain the beneficial aspects of natural selection, we need to use genetic engineering to eliminate that part of her genetic code which would produce offspring also at risk for persistent illness. See my point?
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Who says that there is anything left to evolve into? >>
An easy example to point this out is the average size of people has been steadily increasing. 100 years ago, I would have been average height at 5'6" -- now I'm short. I remember reading something which said that the size of the cranial cavity is increasing, meaning larger brains and more brainpower. Another example.
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An amputated limb isn't passed on to one's offspring. Genetic changes are. >>
Point taken. My intent was to show that trial and error has ruled the day though I understand your concern. The idea of human guinea pigs disgusts people, yet it happens every day with new medical procedures. Aren't genetics but an extension of that?
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With human suffering comes growth. >>
Oh,
Isla, that's a dangerous thought. Are you saying it's justified to allow a boy to die when a simple blood transfusion would save him? Is the growth from a senseless death worth the life that is lost? Are we not under a moral obligation to save a life, or IMPROVE a life, if we have the means? By an absurb extension of that logic, I could execute twenty people and allow their families to "grow" from the experience. We can find reason for many actions, but the prevention of human suffering, to me, is a moral imperative. People can certainly grow from suffering, but senseless and preventable suffering is a tragedy, not a learning experience. While I might learn a great deal from putting a bullet through my thigh, I think I shall decline that lesson.
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With this view, you are not helping the affected individual, you are eliminating it and replacing it with a better individual. >>
Sophistry. Does the genetic code affect the soul of that person? Or, are we defined by the biological entity which contains the soul (assuming, of course, that you believe in the concept)? When is an individual's identity defined? At conception? At birth? At adulthood?
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Maybe one of the reasons he has been able to do so much in his feild is his physical limitations which enhanced his mental exertions. >>
Now, this is an intriguing one. Quite true that this might be the case. Conversely, you mention Einstein, and I could also bring up Newton or da Vinci -- all three unencumbered with a disability yet all three equally deserving of the title of "genius", just as Mr. Hawking is. I tend to belive that Hawking was born with a mental capacity and an unfortunate physical condition. Perhaps his work output would actually be far greater if he had the means to communicate more rapidly? We'll never know. Good point though.