Great simplification pulsing lines

Ep 52  |  Giorgos Kallis

Giorgos Kallis: “Cultural Surplus and ‘Dépense’”

Check out this podcast

Giorgos Kallis The Great Simplification

Show Summary

On this episode, Nate is joined by ecological economist and degrowth scholar Giorgos Kallis. He and Nate discuss the science and philosophy behind the degrowth movement and some of the challenges behind implementing such an enormous task. As a system precariously based on growth becomes more unstable, it is important to turn to those who specialize in ‘out-of-the-box’ thinking. This doesn’t necessarily mean we, as a society, are going to advocate or plan for degrowth – but postgrowth societies are on the horizon, and in many places are already here. Perhaps, the larger purpose of degrowth scholarship (and conversations like these) is to act as Overton Windows – to help people imagine and actualize behaviors and networks that will help us adjust in a post-growth world.

About Giorgos Kallis

Giorgos Kallis is an ecological economist and political ecologist working on environmental justice and limits to growth. He has a Bachelor’s degree in chemistry and a Masters in environmental engineering from Imperial College, a PhD in environmental policy from the University of the Aegean, and a second Masters in economics from the Barcelona Graduate School of Economics. He has been an ICREA professor since 2010. Before coming to Barcelona, Giorgos was a Marie Curie International Fellow at the Energy and Resources group at the University of California-Berkeley. He has also written numerous books, including his latest, Limits: Why Malthus was Wrong and Why Environmentalists Should Care.

In French, we have a motto that says that a simple drawing is often better than a long explanation. Jean-Marc Jancovici Carbone 4 President

That’s very understandable because with left atmosphere thinking, one of the problems is that you see everything as a series of problems that must have solutions. Iain McGilchrist Neuroscientist and Philosopher

We can’t have hundreds and hundreds of real relationships that are healthy because that requires time and effort and full attention and awareness of being in real relationship and conversation with the other human. Nate Hagens Director of ISEOF

This is the crux of the whole problem. Individual parts of nature are more valuable than the biocomplexity of nature. Thomas Crowther Founder Restor

Show Notes & Links to Learn More

Download transcript

00:35 – Giorgos Kallis Works + Info

02:38 – The US geologically rich land, petro-dollar, largest economy, and lingua-franca

05:52Decoupling

07:47 Degrowth Movement

09:20Green Growth

09:45Post-growth

14:15 Increasing inequality and no increase in quality of life with continued growth

18:48 Record debt

19:00Debt is a claim on future energy

21:23Energy requirements and carbon emissions for a low-carbon energy transition | Nature Communications – Aljoša Slameršak, co-authored by Giorgos Kallis

22:50Energy Return on Energy Investment (EROI)

25:44 We are growing renewable rapidly, but still growing fossil fuels faster

30:30Nate’s reflection on TGS Demographics – Frankly #19: Islands

33:50 Availability Cascade

34:01AC limits in Spain in summer ‘22

36:11How extreme cold blasts are affected by climate change

37:45Iñigo Capellán-Pérez Universidad de Valladolid | UVA · Group for Energy, Economics, and System Dynamics of the University of Valladolid

40:18 We use 100 billion barrels of coal, oil, natural gas, which equates to 500 billion human laborers

42:20EROI of fossil fuels vs renewables

42:40 Challenges of energy types in fossil fuels vs renewables

43:04 Julia Steinberger

44:57 Nate’s multi-criteria analysis on Energy thesis

46:20Materials scarcity for renewables

47:23 Olivia Lazard, analysis of location of renewable materials and geopolitical implications

48:01New geopolitical realignment

48:41 Limits: Why Malthus was Wrong and Why Environmentalists Should Care

49:18Thomas Malthus

52:08‘The Good Life’

52:43 Coevolution

52:44 Richard Norgaard

56:50 Spain’s energy per capita, US energy per capita

57:02 Spain’s health care system

57:48 US water per capita, Europe’s energy per capita

57:50Why do US toilets use more water

1:00:53Rethinking degrowth through dépense | Towards a Society of Degrowth

1:00:55Giacomo D’Alisa, Onofrio Romano

1:01:13Georges Bataille

1:06:50Paul Erhlich + TGS Episode

1:07:02Banks creating money

1:07:36Nate’s animated movie

1:10:17Taxing Resources Instead of labor, Untax project

1:13:44Antonio Turiel, Pedro Prieto

1:15:43Climate anxiety

1:17:48 Nate’s Reality 101 Course

1:21:41 Solon

Back to episodes
End of Year ReflectionsWith Nate HagensThe Great SimplificationEp 205 | Nate Hagens

In this week’s episode, Nate reflects on four years(!) of the podcast by answering listener-submitted questions, which cover a broad range of topics related to The Great Simplification. He invites subscribers to investigate how they navigate a complex and ever-changing world, while avoiding overly prescriptive solutions that brush aside personal agency and the inherent uncertainty that exists in our world.

Watch nowDec 17, 2025
Fighting for a Livable FutureWith Kelly ErhartThe Great SimplificationEp 204 | Kelly Erhart

While current conversations about global heating tend to center around a few well-established pieces of science, we don’t often hear about the scientists and leaders working at the frontier of what is still unknown about Earth’s systems. This includes unpredictable tipping points and cascading effects of our rapidly changing climate, as well as the unconventional adaptation strategies that might help us maintain a stable planet. What is the newest climate science being researched right now, and what areas are we still needing to explore as we fight for a livable future? 

Watch nowDec 10, 2025
If Anyone Builds It, Everyone DiesWith Nate SoaresThe Great SimplificationEp 203 | Nate Soares

Technological development has always been a double-edged sword for humanity: the printing press increased the spread of misinformation, cars disrupted the fabric of our cities, and social media has made us increasingly polarized and lonely. But it has not been since the invention of the nuclear bomb that technology has presented such a severe existential risk to humanity – until now, with the possibility of Artificial Super Intelligence (ASI) on the horizon. Were ASI to come to fruition, it would be so powerful that it would outcompete human beings in everything – from scientific discovery to strategic warfare. What might happen to our species if we reach this point of singularity, and how can we steer away from the worst outcomes?

Watch nowDec 3, 2025

Subscribe to our Substack

The Institute for the Study of Energy and Our Future (ISEOF) is a 501(c)(3) non-profit corporation, founded in 2008, that conducts research and educates the public about energy issues and their impact on society.

Support our work
Get in touch
x