Reductivism has greatly benefited
science in that the ability to break down an area of study into a
more neatly defined territory with relatively clear boundaries allows
a researcher to get on with the work at hand and to have a higher hit
rate of identifying that which is measurable in that set range.
However such an approach can suffer
from a lack of holism and the danger of believing that the world does
conveniently fit into the categories we place upon it.
A fascinating demonstration of this, as
featured recently in an article in National Geographic, is the
question over whether it is ethical to bring back extinct species
through cloning methods.
Whatever the most appropriate answer
may be, the question is raised as to what really constitutes an
animal and what the criteria would be for successfully restoring one.
A reductive approach to take would be
to, on a purely genetic level, clone an animal that has died out in
the past. However without parents of its own species to raise it,
possibly without the same environment and climatic conditions as its
ancestors, and with potentially different dietary constraints, what
would be the nature of this animal?
Rather like the observation of
Heraclitus of never being able to step in the same river twice, it
would seem that the natural variation from generation to generation
means that no two animals are ever the same, though they may of
course share certain common characteristics based on the tolerances
we place upon the categories we call species.
However whilst the inevitability of
change could be used as a license to bring back the dead, albeit in a
new 21st century edition, it must be remembered that the
burden of adaptation is something that is typically shared by all of
the members of a species, interactively with their environment, over
the course of time. Placing this amount of pressure to 'fit back in'
on a single representative of a species may prove rather intense.
It strikes me that a good way forward
in answering these types of questions is to not just map genomes, but
also social and environmental factors, to at least attempt to have a
more holistic picture of what makes a species. It might not yield an
a clear answer, but definitely better data to base such a question
upon.
Just as we would likely see it as
inappropriate to clone an animal with only half a nervous system or
with other imperfect and limiting conditions, it may be that the same
concern needs to be placed on the context of that species in their
environment.
Perhaps if it can be determined that a
suitable environment and food source for a given species still
exists, then this will count in favour of it being a candidate for
de-extinction. The issue of socialising is a trickier one but some
species, for example tortoises that hatch from eggs, tend to live
more solitary lives so may be a more appropriate choice.
Another possibility is that herd
animals may also be mixed with other herds, for example mammoths with
elephants, however the results here may be questionable.
If all of the above conditions can be met
then we have to question why the species is extinct to begin with.
Granted it could have been circumstantial, or as a result of human
hunting which could now be defended against, however it would take a
very clear knowledge of all of the extended factors of what makes a
species thrive in order to be able to address this question with any
confidence. And reductivism, for all its triumphs, just doesn't seem
like the right approach.
The full National Geographic article
can be read here.
This is a very interesting post and idea. Wow, it would be fascinating to see how and whether the extinct species could adapt. However, while we are on this subject, what about species that are nowadays under the threat of extinction?
ReplyDeleteI think that we should consider first how to maintain current species and invest our resources into preventing these further extinctions.