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This is of course a imaginary situation used to get at the ethical issue. You can suppose these future imaginary aristocrats have complete control of the traits they want, and have the means of control over all the defects
What if they consider femaleness, homosexuality, or extreme emotional sensitivity, for example, to be defects?
The objective of breeding of dogs is always to "improve on the breed", and that is at least what they say in dog breeding sites. You might ask "How does one improve a breed?". One possible meaning is to find set of traits that are desirable. Suppose one day, scientists can select for traits they want, and manipulate the genes to get. What happens? Rich people would pay the money to improve their offspring, and after many generations of improvements. The aristocrats of our society is of different specie of human beings with super high IQ, and athletic ability.
1. Is it is good, and why is it good.
2. If it is not good, then why not? What can we do to prevent this from happening?
I believe that the brain is largely shaped by experience, and not just genetics.
Personally I prefer Asian girls - and many of them are so beautiful, they don't need any scientific manipulation...
How about a controlled experiment that is based around simply selective breeding, (and I mean specifically around humans). Its alot slower than manipulations, but it would be less frowned upon and perhaps more intriguing. Take a woman and breed her to the most perfect males alive, continue with this for how ever long it needs be and basically you have taken Human evelution into your own hands. (If any of you have read Dune then you should know exactley what im talking about).
alteration also may promote inequality between the haves and have nots.