by donstewart » Tue 20 Sep 2016, 09:30:32
Rockman
I will give you my layman's assessment of where Hubbert fits into the big picture, and where the ETP model fits into a bigger picture.
From The Systems View of Life: 'An iteration found very often in nonlinear systems, which is very simple and yet produces a wealth of complexity, is the mapping equation...
x maps to kx(1-x) where the variable x is restricted to values between 0 and 1
This 'logistic mapping' has many important applications. It is used by ecologists to describe the growth of a population under opposing tendencies and is therefore also known as the 'growth equation'.'
Now, notice a few things. The equation is ONLY capable reflecting TWO opposing tendencies. If you are trying to deal with 'the ten thousand things', then the equation will not do what you want it to do. But all of science has been an attempt to find basic laws which allow us to deduce simple or complex patterns, and to stop believing that there was a god or spirit inside every rock and tree. In many cases, a logistic equation is good enough.
Where does the ETP model fit into this scheme. What follows is my amateur take on the subject. The logistic model frequently works well if there is an infinitely large world out there within which something is growing. We may exhaust all of a particular asset, but there are plenty of other assets. And so Hubbert drew his curve of the depletion of oil, with the growth of nuclear energy making the loss of the oil not particularly important for humans. (Please note that if we had actually built all that nuclear, we probably wouldn't be screwing around with tight oil and tar sands.)
In the decades since Hubbert did his work, we have learned that nuclear isn't going to save us. We also have a much sharper understanding that oil is the key to transportation, and that transportation is, indeed, very important. Those understandings were what underpinned Robert Hirsch's work around 2005.
The ETP model adds a second layer of complexity beyond the simple 'two opposing tendencies'. The ETP model takes Hirsch's insight that oil is the key to transportation, and the insight that transportation is the key to our ability to produce GDP, and proposes a mathematical model of what happens to our ability to produce earnings with which to buy oil, as the productivity of the oil falls in response to depletion and the rise of overhead complexity in the general economy. And if we can't afford to buy oil, we won't produce very much GDP.
Thus, we are looking at a very long chain of intellectual activity which stretches from Leonardo da Vinci, arguably the originator of systems thinking, through the ecologists and Hubbert working on depletable resources, and Hirsch thinking about the centrality of transportation and the role of oil, and finally an elegant model which ties a lot of things together. The elegant model is not so limited as the 'two opposing forces' of the logistic equation, but nor does it try to embrace 'the ten thousand things'. But the model is pregnant with suggestions which impact how we think about and react to 'the ten thousand things'. For example, we can calculate how much of the 200 trillion dollars of global debt will ever be repaid. If we know a little about psychology and sociology, or even have read Dmitry Orlov, we can predict some things about social and economic dysfunction as rich people see their wealth vanish. And so forth and so on.
The criticisms I have seen of the ETP model fall into three groups:
*Nit pickings, such as 'you shouldn't have excluded the Oil Embargo years, because it is immoral to exclude data'. But the oil price is the indicator chose to represent the cost of producing oil, and the price during the oil embargo years was not indicative of the cost of producing oil. Consequently, those years are excluded for a valid reason. One can find many other nit picky objections which make a similar lack of sense.
*The model is incomplete because it doesn't include 'the ten thousand things'. Gail Tverberg is fond of this objection. But this type of objection fails to understand the way science has always worked...which is by simplifying. Einstein said 'models should be simple, but not too simple'. The Hubbert model is 'too simple', while Gail's models are 'too complex'. The ETP model, in my estimation, is 'just right'.
*The model is useless because nobody is going to change their behavior anyway (Rockman's Law). There are some people who believe that it will be very difficult or impossible to get people to change behavior. For example, BW Hill has said that one of his purposes is to convince leaders that going to war over oil is simply stupid...he doesn't seem to be succeeding in moving the world in that direction.
George Mobus posted this a day or two ago: 'This is just a note to alert readers that this Equinox posting will be the first of a five-part series that will (I hope) signal the end of the set of questions I have struggled with regarding the human condition. I have spent no small amount of bytes to the subject of how screwed up things are. Now I want to explore new territory. I'm curious as to what it all means. The Equinox is the 22nd. See you then.'
If we look at the long sweep of humanity from the ancients with a spirit in every tree, to the ubiquity today of our dependence on things we cannot see, such as quantum tunneling, we can see that science really has changed our behavior. Whether we have reached a dead-end, as Mobus suspects, or whether BW Hill will go down in history as the man who prevented an insane war which would have obliterated everything, remains to be seen.
Don Stewart