Backbone

Backbone

From Breakthrough to Built-In

The diffusion story of the technologies that built modern life. Most tech stories skip from "invention" to "winner." Backbone tells the messy middle — who resisted and why, what had to be built first, and what changed once the technology disappeared into the background.

Hosted by Jeff Keltner & Cyrus Mistry · A new episode every month

Start with No. 01 →Follow the show

Latest episode

No. 01 · October 2026 · 112 min

Refrigeration

You Don't Make Cold, You Move Heat

In February 1806 a Boston newspaper ran a one-line joke about a twenty-three-year-old who had loaded a ship with pond ice and sailed for the Caribbean, where nobody had anywhere to keep it. He went to debtors' prison. He also started a two-hundred-year story that ends with a treaty about what's inside your refrigerator — the first in United Nations history ratified by every country on earth. Jeff and Cyrus follow cold from a Boston pond to the stratosphere, and find that every time somebody won a round, the winner fought the next one.

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U.S. households with a mechanical refrigerator

About the show

Every technology you depend on was once a curiosity that smart people thought would never work. Backbone is a deeply researched, narrative-driven podcast about how breakthroughs actually become infrastructure — the decades of resistance, the complementary technologies that had to exist first, the tipping point from novelty to inevitability, and the second-order consequences nobody predicted.

Each monthly episode follows one technology from breakthrough to built-in: the human drama of the breakthrough, the people who fought it (whose arguments were often reasonable), and what changed once it became invisible. Then we run it through the Backbone Test — has it become infrastructure you only notice when it fails, and could we ever go back?

Hosted by Jeff Keltner and Cyrus Mistry. For people who want the story behind the story, not the highlight reel.

The Backbone Test

Every episode ends by asking the same five questions about the technology.

  1. 01

    Invisible?

    Has it become infrastructure you only notice when it fails?

  2. 02

    What depends on it?

    Follow the chain of everything built on top of it.

  3. 03

    What's the hidden cost?

    Energy, labor, environment, inequality, fragility. This is usually where we disagree.

  4. 04

    Could we go back?

    How deep does the dependency run?

  5. 05

    What's next?

    What is still changing behind the scenes?

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