Science, Religion
and Human Nature
Fraser Watts,
Starbridge Lecturer
in Theology and Natural Science
University of Cambridge
Issues on the interface between science
and religion arise in two broad areas, firstly in cosmology and theoretical
physics, secondly in the biological and human sciences. The first set of
issues have attracted a lot of attention; the second are now coming to
the fore. Indeed, the main clashes between science and religion the present
time arise over theories of human nature, where strong forms of reductionism
are rife.
These generally take a 'nothing
but’ form. Sociobiology tends to see human beings as nothing but survival
machines for their genes. Artificial Intelligence tends to see the human
mind as nothing but a computer programme. Neuropsychology tends to see
people as just ‘bundles of neurones’- as Francis Crick put it.
There is nothing in Christian belief
to stand in the way of the scientific study of human beings. Neither is
there any problem in recognising that human beings are part of the natural
world from which we have evolved, and that our remarkable, higher form
of consciousness is grounded in the physical brain.
However, Christians would also want
to claim that our higher properties are real and important. We are spiritual
as well as natural creatures, and as such stand at the ‘hinge’ of creation.
I see it as central to God’s creative purpose that creatures such as ourselves
should evolve to be capable of forming a spiritual relationship with him.
It is an inherent part of scientific
method that it should attempt to explain higher level phenomena in terms
of lower-level ones as far as possible. That is methodological reductionism.
It is usually a fruitful path for science to pursue. However, it is seldom
completely successful, and there is no reason to assume in advance that
it will be. That assumption of complete success is what distinguishes strong
reductionism from methodological reductionism.
To be specific, it is perfectly
sensible for scientists to try to explain how human consciousness arises
from the physical brain. I assume that they will have a measure of success
in that. However, there is nothing in science to support the belief that
they will be completely successful. That leaves Crick’s claim that we are
just ‘bundles of neurones’ as wholly unconvincing.
One of the intriguing things here
is how an alliance has formed between atheism and strong reductionism.
However, there are formal similarities between the arguments advanced in
the two cases.
Strong neuropsychological reductionists
like Crick look at our two languages, one about mind, the other about the
physical brain, and suggest we can drop the first. They think that it is
going to be possible to explain thought processes in terms of the physical
brain so completely that it will be redundant to talk about the mind as
well.
In a similar way there is a religious
language about the world as well as the natural language of the experimental
sciences. Atheists want to eliminate the religious perspective and reduce
everything to natural process. The formal similarity between materialism
and atheism is so close that it is not surprising that they appeal to the
same people.
However, there is no reason to think
that science will be able to explain everything about human beings in physical
terms, and so prove that we are just bundles of ‘neurones’. So, this bold
and over-confident scientific programme gives no support to the parallel
idea that we can explain everything about creation in natural terms, and
that there is no place for God.
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