Originally Posted by blabla
I agree, but that's a debate for another day...
The only thing that hasn't been discussed clearly was the fundamental attribution error, which Randi hinted at. It's not as simple as "remove the alcoholic alleles", because drug abuse arises from many different factors, and many things outside one's control influence it - I would hazard a guess that genetics are a pretty minor component.
There is actually a somewhat amusing irony in it... If survival of the fittest really worked on that, then there would have to be drug abuser alleles. People can't control their genetics, and somehow these people would be similar to the disabled or mentally ill, which most sane people nowadays do not think we should weed out.