Great simplification pulsing lines

Ep 18  |  Thomas Murphy

Thomas Murphy: “Physics and Planetary Ambitions”

Check out this podcast

TGS18 Thomas Murphy The Great Simplification

On this episode, we meet with Professor of Physics at UCSD and the Associate Director of CASS, the Center for Astrophysics and Space Sciences, Tom Murphy.

Murphy shows us how continued growth and energy use is an impossibility if continued at our current trajectory. How does physics constrain our planetary ambitions? Murphy helps us do the math.

To help us align with a post-growth trajectory, Murphy offers suggestions for how humans can begin to treat nature as well as we treat ourselves — and why we must care about the future in order to create a brighter one.

About Tom Murphy

Tom Murphy is a Professor in the Physics Department at UCSD, the Associate Director of CASS, the Center for Astrophysics and Space Sciences, and is the author of Energy and Human Ambitions on a Finite Planet.

From 2003–2020, Murphy led the APOLLO project as an ultra-precise test of General Relativity using the technique of lunar laser ranging. Professor Murphy’s interests are transitioning to quantitative assessment of the challenges associated with long-term human success on a finite planet.

Show Notes & Links to Learn More

Download transcript
Back to all posts
Saving Bats to Save OurselvesWith Iroro TanshiThe Great SimplificationEp 241 | Iroro Tanshi

In this episode, Nate is joined by Nigerian bat biologist Iroro Tanshi to explore how the rediscovery of a bat species unseen in Nigeria for 45 years – and a wildfire that destroyed half its habitat just days later – launched a community-led fire prevention program. Iroro explains how listening to farmers, who no longer knew when it was safe to burn their fields, led to a simple fire danger warning system that local leaders then backed with their own bylaws, directly addressing tragedy-of-the-commons dynamics. She also shares what it’s like to navigate conversations about climate and biodiversity with rural Nigerian communities, and how her team is now scaling their fire management solution across the tropics.

Watch nowNov 4, 2026
A Shattered Market?With Rory JohnstonThe Great SimplificationEp 240 | Rory Johnston

In this episode, Nate welcomes back oil market analyst Rory Johnston for an update on how the crisis has evolved since April. Rory explains why diesel is now the epicenter of the crisis, with crack spreads running five to six times their historical norm, driven by both the Iran war and Ukraine’s strikes on Russian refineries. He also unpacks one of the unexpected moves that lessened the severity of the energy shortage: China’s unprecedented 45% cut in crude imports, which he calls the “Beijing Swing.” Tying these trends together, Rory and Nate explore how soaring shipping costs have fractured a once-global oil market into regional pockets and how the poorest nations are bearing the brunt of demand destruction.

Watch nowOct 28, 2026
Earth's Oldest TeachersWith Robin Wall KimmererThe Great SimplificationEp 239 | Robin Wall Kimmerer

In this episode, Nate is joined by Robin Wall Kimmerer to explore what we can learn from some of Earth’s oldest and smallest beings: plants. Robin weaves together her experience as a botanist and a Citizen Potawatomi Nation member to offer what she’s learned about living well within nature’s limits, including practices such as the Honorable Harvest and the importance of restraint and reciprocity. She also shares the Potawatomi prophecy of the Seventh Fire, in which humanity stands at a fork between a scorched path and a green one, and can only move forward by walking back to recover what was lost along the way. Robin frames this moment as the age of remembering – an invitation to restore the land and our relationship with it.

Watch nowOct 21, 2026

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