Not long ago, a colleague chided me for using the term "the biological revolution. " Like many others, I have employed it as an umbrella term to refer to the seemingly vast, rapidly-moving, and fre- quently bewildering developments of contemporary biomedicine: psy- chosurgery, genetic counseling and engineering, artificial heart-lung machines, organ transplants-and on and on. The real "biological revo- lution," he pointed out, began back in the nineteenth...