Designer Babies

The Earth can support this number of people just fine, it's just that a tiny fraction of it's population hog most of the resources.

I think genetic engineering should be used to remove certain major defects that severely affect lifespan and quality of life, but things that most humans can handle just fine (such as catching a cold etc) shouldn't be given a genetic solution.

Jam it back in, in the dark.

Obviously like most other medical innovations, there would be a thorough vetting process to test for the "what-if" scenarios. While it would be difficult to test every single eventuality, they'd at least try to cover as much as possible. I don't really agree with the bolstering of immune systems in normal, healthy people. We already have enough problems with virulent strains of virus without further accelerating their evolution by tinkering with our own DNA.

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I'm in favour of the attempt to remove certain disabilities like Down's or malformed limbs. I don't think it is a lack of tolerance, but I have seen many people attempt to raise children who have no chance of a decent quality of life. I'm sorry but saying that you love your child won't make up for it not having a face (literally) or having no hands or feet or even worse, some form of severe brain damage.

In the past, the sabre-tooth tiger or the wolf would have preyed upon the weakest in the species, if they didn't die of natural causes. That was a natural form of controlling and limiting the effects of genetic faults. Where's that limiting factor now?

This thing is sticky, and I don't like it. I don't appreciate it.