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Artwork for The Theory of Anything

The Theory of Anything

Bruce Nielson and Peter Johansen
David Deutsch
Critical Rationalism
Karl Popper
Artificial General Intelligence
Induction
Machine Learning
Epistemology
Philosophy
Creativity
Evolutionary Epistemology
Quantum Mechanics
Scientific Method
Beauty
Probability Theory
Neo-Darwinism
Bayesianism
Douglas Hofstadter
Evolution
Popper's Epistemology
Evolutionary Theory

A podcast that explores the unseen and surprising connections between nearly everything, with special emphasis on intelligence and the search for Artificial General Intelligence (AGI) through the lens of Karl Popper's Theory of Knowledge. David Deutsch argued that Quantum Mechanics, Darwinian Evolution, Karl Popper's Theory of Knowledge, and Computational Theory (aka "The Four Strands") represent ... more

PublishesWeeklyEpisodes142Founded6 years ago
Number of ListenersCategories
Society & CulturePhilosophy

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Artwork for The Theory of Anything

Latest Episodes

This week we are joined for the 4th time by physicist Sam Kuypers. From his Conjecture Institute profile: “Quantum physicist, interested in foundational questions. In his research, published in reputable scientific journals, he explores the quantum t... more

Ad hoc saves and immunizing stratagems are phrases Karl Popper used to describe moves humans make when we try to protect our theories from refutation. We all do this every day in one way or another.

But immunizing stratagems hurts theories in that t... more

This week we talk about doomers, specifically AI doomers. Why has it become such a popular notion, especially amongst those who consider themselves the most rational kinds of people, that this kind of apocalypse, amongst others, is imminent? What ass... more

Bruce has made a controversial claim on this show: today's "CritRats" (Critical Rationalists on X) have drifted from what Popper intended. And surprisingly, some of the drift traces back to David Deutsch's reinterpretation of Popper in an attempt to ... more

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Recent Guests

Ray Scott Percival
Renowned intellectual in critical rationalism, author of Myth of the Closed Mind
Episode: Episode 137: Ray Scott Percival on Incurable Mind Viruses
Michael Golding
Psychiatric physician
Episode: Episode 136: Michael Golding on Mental Illness and Universal Explainers
Micah Redding
Host of the Christian Transhumanist Podcast
Episode: Episode 125: Our Lovecraftian Universe?
Logan Chipkin
A writer and president of the Conjecture Institute
Conjecture Institute
Episode: Episode 119: New Right vs Libertarianism w/Logan Chipkin
Jonathan Rauch
Influential public intellectual and author, known for his works on free speech and democracy.
Episode: Episode 117: Jonathan Rauch
Ivan Phillips
Philosopher and Author, specializing in evolutionary biology
Author of 'Textbook Rationality' and 'Counterargument from Design'
Episode: Episode 109: Genes, Emergence, and Platonism (round table with Sadia and Ivan)
Sadia Naeem
Physicist with a PhD, interested in foundational issues in science
Independent researcher and physicist
Episode: Episode 109: Genes, Emergence, and Platonism (round table with Sadia and Ivan)
Michael Levin
Biologist known for his work on cell cognition
Episode: Episode 105: Michael Levin's Unseen World of Cell Cognition
Chris Johansen
Professional jazz musician based in New York City
Episode: Episode 97: Karl Popper On Conservatism in Music (w/Chris Johansen)

Host

Bruce Nielsen
Host with a focus on epistemology, Popper, and Deutsch-inspired theories; guides conversations and challenges ideas.

Reviews

4.9 out of 5 stars from 90 ratings
  • Amazing series

    Very glad to have come across this series.

    Apple Podcasts
    5
    Di$-appointed user
    India6 months ago
  • Intense

    Really substantial stuff here. Cuz i am serious about popper and deutsch and this podcast is perfect for me.

    You guys def deserve more (positive) reviews! Where are the reviews?!! :)

    May 4, 2025

    Really enjoyed the episode. Just a quick thought on the point about Bayesian epistemology vs. Bayesian reasoning. The key difference, I think, is that Bayesian reasoning offers a useful *description* of how agents might update beliefs. That’s fine on its own. But Bayesian epistemology goes further—it ... more

    Apple Podcasts
    5
    wiggy woggy
    Canadaa year ago
  • Intense

    Really substantial stuff here. Cuz i am serious about popper and deutsch and this podcast is perfect for me.

    You guys def deserve more (positive) reviews! Where are the reviews?!! :)

    Apple Podcasts
    5
    wiggy woggy
    Canada2 years ago
  • Intense

    Really substantial stuff here. Cuz i am serious about popper and deutsch and this podcast is perfect for me.

    Apple Podcasts
    5
    wiggy woggy
    Canada2 years ago
  • Popper in-depth

    Gets into the weeds on Popper in a wonderful way. Highly recommended.

    Apple Podcasts
    5
    Al Pittampalli
    United States3 years ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Engaging debates that challenge mainstream views.
Open, intellectual, and occasionally provocative—great for sparking ideas.
Great accessibility for nerdy/philosophical topics.
Thoughtful, rigorous exploration of epistemology and AI.
Impressive depth on Popper, Deutsch, and knowledge creation.

Chart Rankings

How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.

Talking Points

Recent interactions between the hosts and their guests.

Episode 137: Ray Scott Percival on Incurable Mind Viruses
Q: Do we live on Bertrand Russell Island, where ideas can be tested without real-world constraints?
Percival explains that Russell Island is a useful thought experiment to show that even very rational minds can harbor irrational beliefs under certain dynamics, but it does not exist in the real world, so we must study real social and memetic processes to understand how ideas spread and are challenged.
Episode 134: The Deutsch Slot Machine
Q: How do probabilities play into Deutsch's theory?
Probabilities are viewed as a useful approximation rather than a fundamental truth, as Deutsch argues that randomness does not exist in nature, which raises concerns about how decisions are explained without appealing to probabilities.
Episode 128: Induction’s Immunizing Strategy
Q: Do you believe you can justify or provide a degree of support for our universal claims about the world?
Kieren argues that we can provide some rational justification for our general claims through particular observations, while Bruce counters that Popper allows for falsification but denies rational justification of a theory as true.
Episode 124: Popper's Evolutionary Theory of Knowledge
Q: So it seems like both Popper and the Popper Campbell view and Deutsch's two sources view would fundamentally agree that conjecture and refutation can be thought of as a meta-theory of knowledge?
Both Campbell and Popper agree with this assertion, while the validity of Deutsch's perspective may depend on interpretation.
Episode 125: Our Lovecraftian Universe?
Q: Do you and or Bruce see a difference between a more naturalistic, meaning neutral universe and a actively malevolent Lovecraftian universe?
Lovecraft saw a meaningless universe, but there's kind of this idea within Lovecraft that the universe just did not care.

Audience Metrics

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Frequently Asked Questions About The Theory of Anything

What is The Theory of Anything about and what kind of topics does it cover?

A deep, idea-rich discussion space that centers epistemology, critical rationalism, and the nature of knowledge, often through contrasts between Popper and Deutsch. Episodes frequently tackle AGI, Bayesianism, memes, and the science of explanation, weaving philosophy with practical concerns about education, society, and technology. The show stands out for its rigorous, sometimes provocative debates, willingness to challenge established views, and a persistent interest in how knowledge grows in open societies. The format favors long-form conversations and guest interview segments, appealing to listeners who enjoy conceptual rigor and interdisciplinary thought about science, philosophy, and AI.

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Which podcasts are similar to The Theory of Anything?

These podcasts share a similar audience with The Theory of Anything:

1. Increments
2. Conjecture Institute
3. Conversations with Tyler
4. EconTalk
5. Theories of Everything with Curt Jaimungal

How many episodes of The Theory of Anything are there?

The Theory of Anything launched 6 years ago and published 142 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on The Theory of Anything?

Recent guests on The Theory of Anything include:

1. Ray Scott Percival
2. Michael Golding
3. Micah Redding
4. Logan Chipkin
5. Jonathan Rauch
6. Ivan Phillips
7. Sadia Naeem
8. Michael Levin

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