In a recent Op-Ed in the New York Times (September 12), Brian Greene reassured us that the experiments now taking place in the Large Hadron Collider cannot produce a black hole that will swallow the earth. Apparently, Hawking has a theory that any black holes produced by the experiments will disappear almost instantly. We are reassured, that is, until we read the next-to-last paragraph where we are told “the most exciting prospect of all is that the experiments will reveal something completely unanticipated, something that forces us to rethink our most cherished explanations.”
We remember that when the first atomic bomb experiments were carried out in New Mexico some scientists feared that they might set off a conflagration that would burn up the world. It did not happen. But the end result, nevertheless, was the creation of a bomb and the subsequent creation of a larger bomb that when duplicated sufficiently could destroy civilizations, if not all life. Then we and the Russians armed ourselves with the capability to make quite possible a general catastrophe. We still have a sufficient capability to achieve this result, but luckily the probability of a massive use of nuclear weapons has faded into the background.
Many believe that the end of civilization will be brought about by too much knowledge instead of too little. Scientists seem quite unable to control their enthusiasm for the new, and governments or private individuals seem more than willing to support their efforts. Ninety percent of our worries about the increase in the numbers and capabilities of robots, or the creation of new pathogens for warfare or to defend against the pathogens others might create, or what will come of pushing back the frontiers of physics and chemistry, or breakthroughs in the understanding of the brain and how to enter into its deliberations from the outside (initially for treatment of disease perhaps) and so forth may be foolish imaginings. But I think we have developed faith enough in science to believe that a great deal that we cannot conceive of today will be conceived of in the future — and if conceptualized will eventually be rendered “useful”.
Is it not past time that the scientific community consider conditions under which they would agree to abandon further experiments in the general interest of humanity? These may be physical experiments; they may be biological experiments; they may be robotic experiments. The lead must be taken by prominent scientists involved in research in areas that threaten to move humanity into unknown and dangerous territory. Laymen simply cannot know enough to have anything very useful to say in this regard. They can only point out that there must be territory out there that it is too dangerous for science to invade. It may well be that the Hadron Collider is well within safe boundaries. In order to make this and countless similar decisions in the future, scientists need to develop criteria in physics and other fields that would allow them to decide when a dangerous boundary has been crossed.
What these criteria and limits might be are hard to forsee, and they would probably be different from one scientific field to another. The effort will involve difficult issues in the estimation of risk in relation to danger. It will be a major task, one eventually involving the international community. But it seems reasonable to ask that the effort be undertaken. Science is afire. It will solve so many of our problems. But it is also a tool that must be handled with care, and the more so, the more it progresses.
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