"If genetic manipulation gives the parents or children some advantage we cannot but assume that it will become the normal method of conception"

The other responses here answer this pretty well so I don't need to repeat them. But I will ask, if it is a TRUE advantage and does become the *normal* method, where is the problem?

"It was never my claim that eardrums would burst if one exceeded a certain speed"

Of course you didn't. But you did say there were dangers without specifying what they might be. This post is a little better.

"How is it possible to deny that making changes to the human genome will accelerate the rate of change of the human genome. It is practically a truism."

Here you do it again. You imply dangers but don't say what or why. If we accelerate the changes and they happen to be good changes, so what? Many changes we have done in other species have been very beneficial. Now I am not saying we should do this but I certainly don't see that it is in and of itself a bad thing. Using it to get rid of hereditary diseases like Tay Sachs, Sickle cell, Wildebrands Disease and many others would be pretty good don't you think?

"As a final word I would like to ask that any responses limit themselves to why human cloning or genetic manipulation can be accomplished without the above consequences"