Dick Review Reprint
Dick Review Reprint
Dick Review Reprint
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Aliens and us
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Ian A Crawford
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The scientific impact of such a discovery can hardly be exaggerated, but what
about the wider social and cultural impacts? This is the aspect addressed by
Steven J. Dick, a former Chief Historian of NASA and previous holder of the
Baruch S. Blumberg Chair in Astrobiology at the Library of Congress, in his new
book: Astrobiology, Discovery, and Societal Impact. Dick is uniquely placed to
consider these issues, having published widely on the topic for many years,
and has organised numerous interdisciplinary meetings and workshops
specifically to address the societal impacts of contact with extraterrestrial life.
This book provides a valuable distillation of his thinking.
The book is divided into three parts. The first part analyses historical analogues
for the discovery of extraterrestrial life to see if lessons can be learned
regarding the likely societal impact. Dick begins by examining public reactions
to historical cases where, temporarily at least, it appeared that extraterrestrial
life might actually have been discovered. Examples include the Orson Welles’
infamous radio production of War of the Worlds in 1938, the discovery of
pulsars in 1967, and the claimed evidence for fossilized microbes in the
martian meteorite ALH84001 in 1996. History also provides some examples of
the entirely unexpected discovery of new forms of life on this planet, most
notably the discovery of micro-organisms in the 17th century. In addition, there
are well-documented examples of different human cultures coming into
contact with each other, such as the discovery of ancient Greek civilisation by
medieval Europe and the less happy clash of European and Mesoamerican
civilisations in the 16th century, which might give some guide to the
consequences of contact with extraterrestrial technological civilisations.
It has to be said that the results of this historical analysis turned out to be
inconclusive. Indeed, the tentative conclusions that Dick was able to draw
seem rather predictable, namely that the societal impact of the discovery of
alien life is likely to depend on its nature (e.g. microbial vs. intelligent),
distance from us (e.g. on Earth itself, in the Solar System, or around a distant
star), the extent to which such a discovery may be expected in advance (and
thus society prepared for it), and the manner in which news of the discovery is
disseminated by the scientific community, political institutions and the media.
Dick notes that many of these issues have been explored in the science fiction
literature, and I was delighted to see that this extensive body of often very
original thought is given due prominence in his discussion.
In the second part of the book, Dick addresses several unresolved philosophical
issues, mostly in the context of contact with extraterrestrial intelligence (ETI).
For example, he asks if human knowledge is sufficiently universal for us to
communicate with ETI, and stresses that our very definition of ‘intelligence’
may prove to be hopelessly anthropocentric. If ETI perceive the universe in
completely different ways, mutual understanding may be impossible. On the
other hand, any ETI detected by us will necessarily have evolved within the
same physical universe, so some common frames of reference may exist to
facilitate communication. Dick here makes the interesting, and as far as I know
original, suggestion that a comparison between human and alien worldviews
would shed empirical light on a range of philosophical and ethical speculations.
For example, if all ETI were found to adhere to similar ethical rules (e.g. the
‘Golden Rule’ or Kant’s ‘Categorical Imperative’) this might constitute empirical
evidence for the universality of such rules. Of course, the reverse is also true,
which might cause existential problems for some human religions and
philosophies.
This brings us to the third part of the book where Dick examines the wider
cultural, ethical and political impact of discovering extraterrestrial life. He
argues that under the combined influences of astrobiology, space exploration
(especially images of Earth taken from space) and popular science fiction,
humanity is moving towards what might be called a ‘cosmological worldview’
where we see ourselves as integral components of the universe rather than as
somehow separate from it. I agree that it would be highly desirable for
humanity to develop such a worldview, not least because it would help
counter the tide of populist nationalism and religious fundamentalism with
which we are currently afflicted. I think Dick overestimates the extent to which
this perspective has penetrated popular consciousness, but I agree with him
that the discovery of extraterrestrial life could change this profoundly.
Suddenly we would have to face the fact that we are not alone in the universe,
and this would very likely strengthen cosmological perspectives and, hopefully,
stimulate some much-needed cosmopolitan thinking.