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You cannot have a war economy if there is no war. My 4th presentation of “The Seneca Effect” in Paris 

You cannot have a war economy if there is no war. My 4th presentation of “The Seneca Effect” in Paris 

Above, at the Momentum Institute in Paris on Friday 13th, 2017. Ugo Bardi is on the left of the photo, Yves Cochet (president of the institute) is at the center, with the white shirt. 

The presentation at the Institut Momentum on Oct 13th was the fourth of a series of presentation related to my book “The Seneca Effect” that I gave in Paris last week. This one was probably the least formal one of the series. I gave some explanation of how system dynamics models can produce the asymmetric “Seneca Curve,” but I concentrated on a section of the book, the one dealing with the extermination of whales during the 19th century. It is a theme related to the concept of Anthropocene: the human relation with the ecosystem.

The point that I try to stress in these presentations is that most people, including decision-makers, just don’t have the concept of “overshoot”, that is the tendency of consuming more resources than the system can produce, forcing it to crash down after some time. It is something that I described also in a previous talk.

The problem, here, is that not having the concept of overshoot, people happy go along the Seneca trajectory, thinking that the more resources they can extract from the system, the better things are for them. They don’t realize that the more they go up, the faster they’ll have to crash down. I surmised that we have a cultural problem: it is a relatively new concept that will have to penetrate culture. That will take time and it is not obvious that it will ever happen.

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The Way Nature Works: How Common is the Seneca Curve? Ugo Bardi’s Speech at the Summer Academy of the Club of Rome in Florence 

The Way Nature Works: How Common is the Seneca Curve? Ugo Bardi’s Speech at the Summer Academy of the Club of Rome in Florence 

Ugo Bardi at the Summer Academy of the Club of Rome in Florence, September 2017. 

My talk at the Summer Academy of the Club of Rome was mainly a presentation of my latest book, “The Seneca Effect”(Springer 2017). In practice, of course, a book contains many more things than you can say in a 40 minute speech. So, I tried to concentrate on the idea that the behavior I call “the Seneca Curve” is very common, even universal. Below, you can see the Seneca Curve: things go up slowly but collapse rapidly, as the Roman philosopher Seneca said first some two thousand years ago. You may see the same curve also on the t-shirt I was wearing at the Academy.


You may have heard the old Latin motto, “Natura non facit saltus” (Nature doesn’t make jumps) meaning that things change gradually, not abruptly. It may be true in many circumstances but, in practice, it is wholly normal that Nature accumulates energy potentials (as when you inflate a balloon) and then releases them all of a sudden (as when you puncture a balloon). This is the theme of the cover of the German version of my book.

There are reasons why Nature behaves in this way, but the point I made at the school was not so much about why the curve is so common but how human beings are not normally aware of it. In fact, our thought is often shaped by the idea that things will continue evolving the way they have been evolving up to a certain point. Just think about economic growth, and you’ll notice how economists expect it to continue forever. It goes without saying that the economy is one of those complex systems which are most vulnerable to the Seneca collapse.
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