Couverture de Natural Reward Podcast

Natural Reward Podcast

Natural Reward Podcast

De : Owen Gilbert
Écouter gratuitement

The Natural Reward podcast will focus on questions of innovation, progress and advancement in the evolution of life. We will discuss the evolution of scientific theories, how to think critically about science, and questions of progress and advancement in technology and human culture. The Natural Reward podcast will cover the philosophy and history of science, evolutionary theory, and economic theory. Music by Christian Bjoerklund.© 2026 Natural Reward Podcast Nature et écologie Philosophie Science Sciences sociales
Épisodes
  • Natural Reward’s Struggle to Exist: How a New Theory First Entered a Hostile Scientific World

    Natural Reward’s Struggle to Exist: How a New Theory First Entered a Hostile Scientific World
    Jun 1 2026
    I. What does it take for a new scientific theory to come into existence?Before a theory can spread, it must first emerge. It must be invented, named, clarified, defended, revised, and forced into a form that can survive public scrutiny.Only later comes dissemination: the broader process of spreading the theory, persuading an audience, applying it to new problems, and building a scientific movement around it.II. The hostile world: why natural reward had trouble being born.Evolutionary biology was already organized around natural selection, local adaptation, and suspicion toward claims of progress. Natural reward therefore faced resistance on several fronts:Conceptual hostilityA theory of “advancement” sounded dangerously close to goal-directed evolution.Linguistic hostilityTerms such as “reward,” “entrepreneurship,” “monopoly profit,” and “struggle for supremacy” sounded foreign to standard biology.Empirical hostilityReviewers demanded biological evidence rather than analogies from economics, business, or philosophy.Professional hostilityExperts could interpret the project not as a new theoretical synthesis, but as overreach, crackpottery, or a challenge to disciplinary authority.This makes the “hostile scientific world” more than interpersonal conflict. It is the resistance a new conceptual organism faces when it enters an established intellectual ecosystem.III. The first form of the theory: powerful but not yet biologically armoredThe early 2019 preprint is the theory in its first exposed form.It contains the main intuition: natural selection explains the origin of useful inventions, while natural reward explains their broader success, spread, and macroevolutionary consequences.But the theory was still vulnerable. Its analogies were vivid but risky: Apple, Steve Jobs, Steve Wozniak, McDonald’s, Ray Kroc. They clarified the distinction between invention and dissemination, but also invited reviewers to see the theory as economics projected onto nature.Natural reward had been conceived, but it had not yet evolved the traits needed to survive peer review.IV. Peer review as selection pressureReviewers imposed demands that reshaped the theory’s phenotype:remove loose economic analogies;provide biological mechanisms;define progress;clarify the difference between natural selection and natural reward;avoid language suggesting conscious foresight;show that the theory applies across real biological systems.The paper itself underwent a kind of intellectual selection. Weak or vulnerable formulations were stripped away. Stronger formulations survived.V. The conceptual birth: natural selection as blind inventor, natural reward as blind entrepreneurThe mature theory emerges when the contrast becomes precise:Natural selection is the blind inventor.It produces traits through local, immediate, incremental advantages.Natural reward is the blind entrepreneur.It explains the broader success of those traits when they unlock new resources, ecological opportunities, or zones of expansion.The key word is blind.The theory rejects teleology. Natural reward does not guide organisms toward future goals. It rewards inventions when circumstances make them spread.VI. Replacing business analogies with biological case studies.This was the main transformation of the manuscript: the theory acquired biological armor.A. Sea squirt histocompatibilitySea squirts show how a trait can originate as a local solution to conflict and later enable long-term resilience.The recognition system does not evolve because somatic parasites already provide the main selective pressure. Rather, fusion creates the conditions for discriminatory conflict among cell lineages, and that conflict selects for histocompatibility. Once the system exists, it incidentally protects against the spread of obligate parasites.This illustrates how biologists had often confused an incidental effect with the adaptive cause.B. C4 photosynthesis.C4 photosynthesis shows that the cause of origin and the cause of later success can differ.Intermediate steps may have evolved as local fixes for photorespiration, not as adaptations for domination in low-CO₂ environments. Later, when atmospheric conditions changed, the completed system was rewarded with ecological expansion.This is one of the clearest cases in which an invention can lie dormant for millions of years before finally spreading.C. Mammalian radiation after the dinosaurs.Mammals evolved traits such as endothermy, lactation, placenta, neurological capacity, and nocturnal adaptations under the shadow of dinosaurs.Those traits did not originate because mammals foresaw a post-asteroid world. But when the dinosaurs disappeared, those accumulated capacities were rewarded by a vast vacant ecological field.This example gives natural reward its macroevolutionary drama.VII. The linguistic battle: why “struggle for supremacy” matters.This is not a minor wording dispute. It is a battle over whether the ...
    Afficher plus Afficher moins
    1 h et 1 min
  • Hamilton’s Rule and Inclusive Fitness, Part I: What Did Hamilton (1964) Actually Define?

    Hamilton’s Rule and Inclusive Fitness, Part I: What Did Hamilton (1964) Actually Define?
    Feb 24 2026

    Keywords

    Inclusive fitness, Hamilton’s rule, kin selection, altruism, social evolution, population genetics, gene substitution, Fisher’s average effect, relatedness, evolution of cooperation, greenbeard effect, dominance, allele frequency change, mathematical modeling, empirical research

    Summary

    In this episode of the Natural Reward podcast, brothers Owen and Jon Gilbert revisit Hamilton’s original papers on inclusive fitness and the evolution of altruism. They discuss how Hamilton’s rule (rb – c > 0) emerged as a condition for the spread of social alleles, and how Hamilton’s original formulation of inclusive fitness involved subtracting the “dilution effect” of uncorrelated interactions from total fitness.

    The conversation explores longstanding ambiguities in the 1963–64 papers, including whether inclusive fitness applies to alleles, genotypes, or individuals, and how assumptions such as haploidy or additive gene action affect the interpretation of Hamilton’s rule. Owen outlines how the quantity rb – c corresponds to Fisher’s average effect of a gene substitution under certain conditions, while becoming frequency dependent under dominance or decoupled from relatedness in greenbeard scenarios.

    These distinctions have important implications for empirical work: subsequent theoretical generalizations often redefine r, b, and c so that rb – c tracks allele-frequency change, making it difficult to determine when Hamilton’s original rule has actually been tested. The episode concludes by emphasizing the need for clearer theoretical guidance in designing experiments capable of rigorously evaluating Hamilton’s rule in natural populations.

    Takeaways

    • Hamilton (1964) defined inclusive fitness by subtracting the dilution effect from total fitness.
    • It is not always clear in Hamilton’s early papers whether inclusive fitness applies to alleles, genotypes, or individuals.
    • Under haploidy or additive gene action, rb – c corresponds to Fisher’s average effect of a gene substitution.
    • With dominance, the average effect becomes frequency dependent.
    • In greenbeard scenarios, altruistic alleles can be favored even when rb – c < 0.
    • Later theoretical work often defines r, b, and c so that rb – c is proportional to allele-frequency change.
    • Empirical researchers typically measure genealogical relatedness and phenotypic costs and benefits.
    • Applying Hamilton’s rule outside of strictly altruistic contexts can make b and c difficult to interpret.
    • A central challenge is determining how to test Hamilton’s rule in real populations with measurable parameters.

    Chapters

    00:00 Introduction to Inclusive Fitness and Hamilton's Rule
    01:16 Exploring Hamilton's Original Work
    03:27 Clarifying Inclusive Fitness Definitions
    05:08 Mathematical Clarity in Inclusive Fitness
    07:18 The Concept of Exclusive Fitness
    10:39 Dominance and Its Implications
    12:55 Average Effect of Gene Substitution
    15:35 Challenges in Empirical Applications of Hamilton's Rule
    Afficher plus Afficher moins
    17 min
  • Composite-trait evolution in pitcher plants: Ulrike Bauer

    Composite-trait evolution in pitcher plants: Ulrike Bauer
    Mar 1 2024

    Ulrike Bauer discusses the evolution and diversity of pitcher plants, focusing on the spring trapping mechanism found in some species. Pitcher plants are carnivorous plants that capture insects in a fluid-filled cavity. They have evolved independently multiple times and are found all over the world. The spring trapping mechanism is a composite trait that involves multiple adaptations, including a horizontal lid, a spring-like structure, and a slippery surface. The study of this mechanism involved fieldwork, experiments, and collaboration between researchers with expertise in ecology, biomechanics, and evolutionary biology. In this part of the conversation, Ulrike discusses the evolution of a composite trait and the opportunity to study how such a trait can evolve independently in different species. She explains how she came up with hypotheses and tested them to understand the evolution of the spring trapping plant. The conversation also explores the absence of transitional stages in the fossil record and the role of randomness in the emergence of complex traits. Ulrike's research challenges the traditional narrative of goal-directed evolution and highlights the importance of considering alternative mechanisms. The conversation explores the evolution of complex traits and the emergence of their functions. It discusses the stepwise process of trait evolution, such as self-incompatibility in plants and the evolution of pitcher plants. The incidental effects of complex traits on extinction rates and the maintenance of sexual reproduction are also examined. The concept of innovation in evolutionary biology is explored, highlighting the importance of variation and the role of selection in generating novelty. The challenges of studying complex trait evolution and the need for more empirical studies are discussed.

    Takeaways

    • Pitcher plants are carnivorous plants that have evolved independently multiple times and are found all over the world.
    • The spring trapping mechanism in pitcher plants is a composite trait that involves multiple adaptations.
    • The spring trapping mechanism is an example of a moving trap that employs movement to capture prey.
    • The study of the evolution of pitcher plants involved fieldwork, experiments, and collaboration between researchers with different areas of expertise.
    • Composite traits can evolve independently in different species, providing an opportunity to study the evolution of complex traits.
    • Hypotheses can be formulated and tested to understand the mechanisms behind the evolution of composite traits.
    • The absence of transitional stages in the fossil record challenges the traditional narrative of goal-directed evolution.
    • Randomness and variability play a significant role in the emergence of complex traits. Complex traits often evolve through a stepwise process, gradually building upon existing traits to create new functions.
    • Incidental effects of complex traits can have significant ecological and evolutionary consequences, such as influencing extinction rates.
    • The distinction between invention and innovation is important in understanding the origin and spread of complex traits.
    • Variation is a key factor in generating novelty and driving the evolution of complex traits.
    • Studying the origin of complex traits can provide valuable insights into the mechanisms of evolution.
    Afficher plus Afficher moins
    1 h et 48 min
adbl_web_anon_alc_button_suppression_c
Aucun commentaire pour le moment