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By John Dennehy | May 13th 2009 03:56 PM | 7 comments | Print | E-mail | Track Comments
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About John Dennehy

I'm an evolutionary biologist and assistant professor at Queens College, City University of New York, who studies bacteriophage life history stochasticity and the population dynamics of host/pathogen


... Full Bio


The Origins of the Reductionist Program

"How can the events in space and time which take place within the spatialboundary of a living organism be accounted for by physics and chemistry?" Erwin Schrodinger - What is Life - 1944

This week's citation classic is a book by Erwin Schrodinger (of the cat fame), What is Life? It is notable, not for its influence on biologists, but rather for its influence on physicists.



Schrodinger was a Nobel Prize-winning physicist, most cited for his work on wave mechanics, who had the temerity to cross disciplinary boundaries and publish a short text intended for the layperson interested in basic biology and physics. Indeed biologists at the time attacked it on account of its naivete and extreme reductionism.

The book's overriding contention was that all of biology could be reduced into chemical and
physical laws, a statement that most biologists today will agree with. However, back in the day, reductionist beliefs were definitely not in fashion; it was strongly opposed by scientists such as Wigner, Polanyi, Elsasser, and Koestler. There were many holdouts clinging to the edifice of vitalism long after the luminiferous ether and the phlogiston theory faded from scientific relevance.

What is Life? was largely ignored by biologists, but embraced by chemists and physicists. Chargaff, Stent, Benzer, Delbruck, Symonds, Meselson, Watson, Crick, Wilkins, Luria, Appleyard et al. were all lured to cross disciplinary boundaries after reading the text or interacting with those who did.

Schrodinger's book had a very positive effect on me and got me, for the first time, interested in biological problems. ----Maurice Wilkins

On those who came into the subject just after the 1939-1945 war, Schrodinger's little book... seems to have been particularly influential.... Schrodinger's book was very timely and attracted people who might otherwise not have entered biology at all. ----Francis Crick

[After reading WIL], I became polarized towards finding out the secret of the gene. ----James D. Watson

Delbruck first entered my life in the form of a chapter heading ‘Delbruck’s model’ in Schrodinger’s book What is Life? I read that book at an impressionable age, while still a graduate student in solid state physics. ----Seymour Benzer

Schrodinger, then, can be credited with inspiring a generation hell-bent on discovering the nature of the gene, and by 1970, they had largely succeeded. The reductionist program has been taken to its logical extent, delving the depths of molecular biology, the nature of the gene and the biochemical basis of life. Today the reunification of organismal and reductionist biology is well underway, and biology is ever stronger for its conceptual foundations in chemistry and physics.



Comments

Gerhard Adam's picture
It is interesting, especially when one considers that you can't have biology without understanding the chemical processes, and chemistry doesn't work without the laws of physics.

It's certainly a quaint notion that such a thing would be considered extreme reductionism.

jdennehy's picture
It certainly seems quaint, but for the biologist coming up in the 50's and 60s, the idea that life could be studied in a test tube was somewhat heretical. Some of my more natural historian style colleagues (albeit emeritus or close to retirement) still disparage molecular biology as not "real biology".

Gerhard Adam's picture

I think there is a fundamental disconnect in many people's minds regarding biology as being somehow separate and apart from chemistry/physics.  It's difficult to reconcile the emergent properties of life as simply (realizing it's not that simple) chemistry.

Who would've thought that "better living through chemistry" was literally true ... :)



rholley's picture
This book sounds like a must-read.  It is in our university library, but " In Closed Access - available on request".

However, "What is Life" could be interpeted differently in different spheres.  As his biography shows, he was also an active participant in the Seductionist programme.  I'm suprised that there weren't calls for his cat to be neutered.  Would it be deconstructionist were one to bear this in mind while reading his last book Meine Weltansicht (1961) which expresses his own metaphysical outlook?





Gerhard Adam's picture
Actually it is available online as a PDF

logicman's picture
Thank's John, for pointing out this interesting book!

For people with a slow web connection,  What is Life? is also available from  Stanford, which may make a difference at busy times.
I found the Stanford connection to be slightly quicker from the UK.

jdennehy's picture
Sweet! Thanks for the links!

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