
Hear This Idea
Hear This Idea is a podcast showcasing new thinking in philosophy, the social sciences, and effective altruism. Each episode has an accompanying write-up at www.hearthisidea.com/episodes.
Latest episodes

Nov 24, 2023 • 1h 19min
Bonus: 'How I Learned To Love Shrimp' & David Coman-Hidy
Former President of The Humane League, David Coman-Hidy, discusses scaling organizations and recognizing the need for change. They also explore the pragmatist vs abolitionist debate in animal advocacy, navigating critiques, and maintaining collaboration in animal activism. The impact of salary and professionalization in organizations is examined, along with the harmful campaign by Adam International. Positive news in the animal world, including achievements of the Open Wing Alliance and New York hospital system's increase in plant-based options, is also discussed.

Nov 22, 2023 • 1h 28min
#73 – Michelle Lavery on the Science of Animal Welfare
Michelle Lavery discusses the science of animal welfare, including how scientists study animal emotions, the use of anthropomorphism, measuring animal preferences, perceptions of animal welfare science, and how to get involved with the study of animal emotions.

24 snips
Nov 4, 2023 • 1h 48min
#72 – Richard Bruns on Indoor Air Quality
Richard Bruns, Senior Scholar at Johns Hopkins Center for Health Security and former Senior Economist at the US FDA, discusses the importance of indoor air quality (IAQ) and interventions to improve it such as air filtration and germicidal UV light. They also explore the impact of particulate matter on human health, the value of statistical life, national policy changes needed for widespread adoption of IAQ interventions, and the role of FDA regulation. Additionally, they touch on rethinking cost-benefit analysis, complex systems, and cultural socialization.

4 snips
Oct 19, 2023 • 2h 53min
#71 – Saloni Dattani on Malaria Vaccines and Missing Data in Global Health
Saloni Dattani, a researcher at Our World in Data and founder of Works in Progress, discusses the history of malaria eradication efforts, delays in developing a malaria vaccine, the rollout of the RTS,S vaccine, the issue of missing global health data, and the uncounted deaths from snakebites in India. They also talk about new funding models for life-saving research like vaccines for TB and HIV.

Sep 20, 2023 • 1h 40min
#70 – Liv Boeree on Healthy vs Unhealthy Competition
Liv Boeree is a former poker champion turned science communicator and podcaster, with a background in astrophysics. In 2014, she founded the nonprofit Raising for Effective Giving, which has raised more than $14 million for effective charities. Before retiring from professional poker in 2019, Liv was the Female Player of the Year for three years running. Currently she hosts the Win-Win podcast (you’ll enjoy it if you enjoy this podcast).
You can see more links and a full transcript at hearthisidea.com/episodes/boeree.
In this episode we talk about:
Is the ‘poker mindset’ valuable? Is it learnable?
How and why to bet on your beliefs — and whether there are outcomes you shouldn’t make bets on
Would cities be better without public advertisements?
What is Moloch, and why is it a useful abstraction?
How do we escape multipolar traps?
Why might advanced AI (not) act like profit-seeking companies?
What’s so important about complexity? What is complexity, for that matter?
You can get in touch through our website or on Twitter. Consider leaving us an honest review wherever you're listening to this — it's the best free way to support the show. Thanks for listening!

Aug 31, 2023 • 1h 47min
#69 – Jon Y (Asianometry) on Problems And Progress in Semiconductor Manufacturing
Jon Y, creator of the Asianometry YouTube channel and newsletter, discusses compute trends, semiconductor geopolitics, and the potential of room temperature superconductivity. They explore the distinctions between consumer and specialized hardware for AI, the role of semiconductor chips in the industry, and the challenges and concerns in semiconductor manufacturing. They also delve into complex supply chains, the concept of superconductivity, the research process, and the connection between nuclear weapons and the semiconductor supply chain.

Aug 4, 2023 • 1h 39min
#68 – Steven Teles on what the Conservative Legal Movement Teaches about Policy Advocacy
Steven Teles s is a Professor of Political Science at Johns Hopkins University and a Senior Fellow at the Niskanen Center. His work focuses on American politics and he written several books on topics such as elite politics, the judiciary, and mass incarceration.
You can see more links and a full transcript at hearthisidea.com/teles
In this episode we talk about:
The rise of the conservative legal movement;
How ideas can come to be entrenched in American politics;
Challenges in building a new academic field like "law and economics";
The limitations of doing quantitative evaluations of advocacy groups.
If you have any feedback, you can get a free book for filling out our new feedback form. You can also get in touch through our website or on Twitter. Consider leaving us a review wherever you're listening to this — it's the best free way to support the show. Thanks for listening!
Key links:

10 snips
Jul 18, 2023 • 2h
#67 – Guive Assadi on Whether Humanity Will Choose Its Future
Guive Assadi is a Research Scholar at the Center for the Governance of AI. Guive’s research focuses on the conceptual clarification of, and prioritisation among, potential risks posed by emerging technologies. He holds a master’s in history from Cambridge University, and a bachelor’s from UC Berkeley.
In this episode, we discuss Guive's paper, Will Humanity Choose Its Future?.
What is an 'evolutionary future', and would it count as an existential catastrophe?
How did the agricultural revolution deliver a world which few people would have chosen?
What does it mean to say that we are living in the dreamtime? Will it last?
What competitive pressures in the future could drive the world to undesired outcomes?
Digital minds
Space settlement
What measures could prevent an evolutionary future, and allow humanity to more deliberately choose its future?
World government
Strong global coordination
Defensive advantage
Should this all make us more or less hopeful about humanity's future?
Ideas for further research
Guive's recommended reading:
Rationalist Explanations for War by James D. Fearon
Meditations on Moloch by Scott Alexander
The Age of Em by Robin Hanson
What is a Singleton? By Nick Bostrom
Other key links:
Will Humanity Choose Its Future? by Guive Assadi
Colder Wars by Gwern
The Secret of Our Success: How Culture Is Driving Human Evolution, Domesticating Our Species, and Making Us Smarter by Joseph Henrich (and a review by Scott Alexander)

Jun 25, 2023 • 2h 32min
#66 – Michael Cohen on Input Tampering in Advanced RL Agents
Michael Cohen is is a DPhil student at the University of Oxford with Mike Osborne. He will be starting a postdoc with Professor Stuart Russell at UC Berkeley, with the Center for Human-Compatible AI. His research considers the expected behaviour of generally intelligent artificial agents, with a view to designing agents that we can expect to behave safely.
You can see more links and a full transcript at www.hearthisidea.com/episodes/cohen.
We discuss:
What is reinforcement learning, and how is it different from supervised and unsupervised learning?
Michael's recently co-authored paper titled 'Advanced artificial agents intervene in the provision of reward'
Why might it be hard to convey what we really want to RL learners — even when we know exactly what we want?
Why might advanced RL systems might tamper with their sources of input, and why could this be very bad?
What assumptions need to hold for this "input tampering" outcome?
Is reward really the optimisation target? Do models "get reward"?
What's wrong with the analogy between RL systems and evolution?
Key links:
Michael's personal website
'Advanced artificial agents intervene in the provision of reward' by Michael K. Cohen, Marcus Hutter, and Michael A. Osborne
'Pessimism About Unknown Unknowns Inspires Conservatism' by Michael Cohen and Marcus Hutter
'Intelligence and Unambitiousness Using Algorithmic Information Theory' by Michael Cohen, Badri Vallambi, and Marcus Hutter
'Quantilizers: A Safer Alternative to Maximizers for Limited Optimization' by Jessica Taylor
'RAMBO-RL: Robust Adversarial Model-Based Offline Reinforcement Learning' by Marc Rigter, Bruno Lacerda, and Nick Hawes
'Quantilizers: A Safer Alternative to Maximizers for Limited Optimization' by Jessica Taylor
Season 40 of Survivor

24 snips
Jun 10, 2023 • 1h 44min
#65 – Katja Grace on Slowing Down AI and Whether the X-Risk Case Holds Up
Katja Grace is a researcher and writer. She runs AI Impacts, a research project trying to incrementally answer decision-relevant questions about the future of artificial intelligence (AI). Katja blogs primarily at worldspiritsockpuppet, and indirectly at Meteuphoric, Worldly Positions, LessWrong and the EA Forum.
We discuss:
What is AI Impacts working on?
Counterarguments to the basic AI x-risk case
Reasons to doubt that superhuman AI systems will be strongly goal-directed
Reasons to doubt that if goal-directed superhuman AI systems are built, their goals will be bad by human lights
Aren't deep learning systems fairly good at understanding our 'true' intentions?
Reasons to doubt that (misaligned) superhuman AI would overpower humanity
The case for slowing down AI
Is AI really an arms race?
Are there examples from history of valuable technologies being limited or slowed down?
What does Katja think about the recent open letter on pausing giant AI experiments?
Why read George Saunders?
Key links:
World Spirit Sock Puppet (Katja's main blog)
Counterarguments to the basic AI x-risk case
Let's think about slowing down AI
We don't trade with ants
Thank You, Esther Forbes (George Saunders)
You can see more links and a full transcript at hearthisidea.com/episodes/grace.