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The Demon-Haunted World_ Science as a Candle in the Dark - Carl Sagan [142]

By Root 2075 0
offered for this slaughter is the mass murderers’ claim that, in exchange for circumcising their sons and adopting a particular set of rituals, their ancestors were long before promised that this land was their land. Not a hint of self-reproach, not a muttering of patriarchal or divine disquiet at these campaigns of extermination can be dug out of holy scripture. Instead, Joshua ‘destroyed all that breathed, as the Lord God of Israel commanded’ (Joshua, x, 40). And these events are not incidental, but central to the main narrative thrust of the Old Testament. Similar stories of mass murder (and in the case of the Amalekites, genocide) can be found in the books of Saul, Esther, and elsewhere in the Bible, with hardly a pang of moral doubt. It was all, of course, troubling to liberal theologians of a later age.

It is properly said that the Devil can ‘quote Scripture to his purpose’. The Bible is full of so many stories of contradictory moral purpose that every generation can find scriptural justification for nearly any action it proposes, from incest, slavery and mass murder to the most refined love, courage and self-sacrifice. And this moral multiple personality disorder is hardly restricted to Judaism and Christianity. You can find it deep within Islam, the Hindu tradition, indeed nearly all the world’s religions. Perhaps then it is not so much scientists as people who are morally ambiguous.

It is the particular task of scientists, I believe, to alert the public to possible dangers, especially those emanating from science or foreseeable through the use of science. Such a mission is, you might say, prophetic. Clearly the warnings need to be judicious and not more flamboyant than the dangers require; but if we must make errors, given the stakes, they should be on the side of safety.

Among the IKung San hunter-gatherers of the Kalahari Desert, when two men, perhaps testosterone-inflamed, would begin to argue, the women would reach for their poison arrows and put the weapons out of harm’s way. Today our poison arrows can destroy the global civilization and just possibly annihilate our species. The price of moral ambiguity is now too high. For this reason - and not because of its approach to knowledge - the ethical responsibility of scientists must also be high, extraordinarily high, unprecedent-edly high. I wish graduate science programmes explicitly and systematically raised these questions with fledgling scientists and engineers. And sometimes I wonder whether in our society, too, the women - and the children - will eventually put the poison arrows out of harm’s way.

17

The Marriage of

Scepticism and Wonder

Nothing is too wonderful to be true.

Remark attributed to Michael Faraday (1791-1867)

Insight, untested and unsupported, is an insufficient guarantee of truth.

Bertrand Russell, Mysticism and Logic (1929)

When we are asked to swear in courts of law that we will tell ‘the truth, the whole truth, and nothing but the truth’, we are being asked the impossible. It is simply beyond our powers. Our memories are fallible; even scientific truth is merely an approximation; and we are ignorant about nearly all of the Universe. Nevertheless, a life may depend on our testimony. To swear to tell the truth, the whole truth, and nothing but the truth to the limit of our abilities is a fair request. Without the qualifying phrase, though, it’s simply out of touch. But such a qualification, however consonant with human reality, is unacceptable to any legal system. If everyone tells the truth only to a degree determined by individual judgement, then incriminating or awkward facts might be withheld, events shaded, culpability hidden, responsibility evaded, and justice denied. So the law strives for an impossible standard of accuracy, and we do the best we can.

In the jury selection process, the court needs to be reassured that the verdict will be based on evidence. It makes heroic efforts to weed out bias. It is aware of human imperfection. Does the potential juror personally know the district attorney, or the prosecutor,

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