Introduction

There’s this joke that fusion is always 30 years away. 50 years ago, it was 30 years away. 20 years ago, it was still thirty years away. Today, though… we might be within a decade. 

We spent the first half of the season on nuclear fission, and the last episode on many of the other energy sources that will play a role in meeting humanity’s growing energy demands and building an Age of Miracles. All of them will be critical. 

But there’s a growing chorus of people who believe that if we’re going to meet the demand for 3-5x the amount of energy we use today, and do it with clean energy, we’re going to need clean energy. And that as we climb the Kardashev Scale – the framework for measuring a civilization's level of technological advancement based on the amount of energy it can use – fusion is going to be our ladder. 

In today's episode, we’ll cover the basics of fusion energy – what it is, how it works, why it matters, how progress is measured, and what the main approaches are. 

Thank you to this episode’s guests: Clay Dumas, Andrew Côté, Sehila Gonzalez, Ian Hogarth, and Ryan Umstattd.

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Timestamps:

(00:00) The fusion race

(06:55) How does fusion work?

(16:02) Fusion reactor designs

(20:24) History of fusion

(25:02) The three approaches to plasma confinement

(30:50) The tokamak

(35:24) Iter

(41:54) Recap

(49:01) Revisiting why fusion matters

This show is produced by Turpentine: a network of podcasts, newsletters, and more, covering technology, business, and culture — all from the perspective of industry insiders and experts. We’re launching new shows every week, and we’re looking for industry-leading sponsors — if you think that might be you and your company, email us at erik@turpentine.co.