Science, Religion and the Search for Extraterrestrial Intelligence
Oxford University Press, 240pp, £25
In 1960 in West Virginia, the astronomer Frank Drake initiated the first systematic scientific attempt to scan the heavens for alien communication. Today, SETI (the search for extraterrestrial intelligence), which requires significant investments of money and hope, remains the most daring attempt to settle the question of whether we are alone in the universe or whether, at some point in time, on some faraway, spinning extrasolar planet, other forms of intelligent life evolved.
For some, a single clear sign – a purposeful blip in the background radio hum of the universe – would be enough to change for ever their understanding of the universe and, in particular, the place of human beings within it. Above all, it is Christians whose belief system would require the most recalibration: they are devoted to a biblical understanding of man’s position in the universe and believe that the unique events of Christ’s birth, death and resurrection confirmed the special relationship between a creator God and His earthbound creation. The late-18th-century thinker Thomas Paine declared in The Age of Reason that anyone who believes himself to be both a Christian and a reasonable defender of the idea of the existence of other worlds has “thought but little of either”.
This book is a brave riposte to Paine. David Wilkinson, a professor of theology and religion at Durham University, is both an astronomer and a Christian. He holds PhDs in theoretical astrophysics and systematic theology. Here he undertakes to examine the consequences for Christian thinking of the latest developments in the search for extraterrestrial life. A Methodist, he scrupulously investigates the science involved and offers a detailed reconsideration of that science in the light of his and other Christian beliefs.
In the 3rd century BC, the Greek philosopher Epicurus wrote: “There are infinite worlds both like and unlike ours . . . We must believe that in all worlds there are living creatures.” For over 2,500 years human beings have speculated about life beyond our planet. The logic of infinity has seemed to require the belief that somewhere, whether in this or another, parallel universe, the purposeful (or purposeless) accidents that brought about our existence have achieved the same for little green men or other, unimaginable forms of life. As Wilkinson points out, philosophers and scientists in the Judaeo-Christian tradition have often been at the forefront of such thinking, their faith in a benign, all-powerful God leading them to assume an inherent order in the natural world and to exult in His capacity to encourage life extravagantly throughout the universe.
Set against this candid presumption in favour of extraterrestrial intelligence have been two lines of thought. Some Christians, attached to the biblical account of God’s special relationship with human beings, have considered it blasphemous to challenge earth’s central place in God’s plan (Giordano Bruno was burned at the stake in 1600 for his temerity to do so). From an opposing perspective, evolutionary biologists from Charles Darwin up to the present day have teased out the multitudinous improbabilities of the evolution of any life at all, let alone intelligent life. For some contemporary cosmologists, it has come to seem almost miraculous how perfectly aligned these chances have been in the case of our “goldilocks” planet – and therefore practically impossible that the same could occur elsewhere. As Wilkinson puts it, even if we were to find traces of primitive life on Mars, “It is a long way to proceed from archaea to an accountant.”
Wilkinson valiantly defends SETI from every corner, however. With one foot on the rock of science, he tackles the paradox, enunciated in 1950 by the physicist Enrico Fermi, that if earth is not special in having intelligent life, “Where is everybody?” With his other foot on the rock of faith, he explores how Christian thinkers have extended the reach of salvation to the furthest limits of the known and unknown universe while imagining hopefully that on other planets there may have been no apple, and so no sin.
The difficulty is that, despite this straddling, the book falls into two halves. The uneasy fit between evidence-based science and Christian apologetics is exacerbated by the unnecessary attention that Wilkinson gives to wacky theories about UFOs and other fantasies and by the absence of analysis of the perspectives of the other major religions. His argument is thorough rather than elegant and on some occasions he irritatingly fails to identify beyond the name the authorities he quotes, so that the reader has to check the position they occupy in the debate.
In keeping with the teaching of John Wesley, the founder of Methodism, who urged those eager to embrace the idea of extraterrestrial life to “be not so positive”, Wilkinson is carefully agnostic about its eventual discovery. However, it is clear that, for him, as for many Christians, “the eternal silence of those infinite spaces”, as Pascal put it, offers a greater existential threat than the demotion of earth’s centrality that the discovery of extraterrestrials would require.
Emma Crichton-Miller is a journalist and producer