It is difficult to imagine a greater imposition than adding genes to future generations that changes the nature of future people.

The pressures for human cloning are powerful; but, although it seems likely that somebody, at some time, will attempt it, we need not assume that it will ever become a common or significant feature of human life.

I see nothing wrong ethically with the idea of correcting single gene defects through genetic engineering. But I am concerned about any other kind of intervention, for anything else would be an experiment, which would impose our will on future generations and take unreasonable chances with their welfare ... Thus such intervention is beyond the scope of consideration.

It is difficult to imagine a greater imposition than adding genes to future generations that changes the nature of future people.