Knowing is not a rationale for not acting. Can we doubt that knowl-edge has become a weapon we wield against ourselves?

But many other people who know about the dangers still seemstrangely silent. When pressed, they trot out the “this is nothing new”riposte—as if awareness of what could happen is response enough.They tell me, There are universities filled with bioethicists who studythis stuff all day long. They say, All this has been written about before,and by experts. They complain, Your worries and your arguments arealready old hat.