It's also a huge mistake to think that this is the ONLY thing those genes do. It's likely that many of them will increase depression, anxiety, ADD, schizophren

It's also a huge mistake to think that this is the ONLY thing those genes do. It's likely that many of them will increase depression, anxiety, ADD, schizophrenia, drug addiction, etc. Evolution produces genomes within the constraint of the environment. I'm no luddite, but I'd be pretty concerned with genetic engineering without regard for the environment of the individual.