Rob Henderson – The Psychology of Morality

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Rob Henderson - The Psychology of Morality

Rob Henderson – The Psychology of Morality

The Psychology of Morality

In The Psychology of Morality, an eight-hour course, Dr. Rob Henderson explores the origins of morality and how it functions as a built-in feature of human nature designed to sustain cooperation. We examine the distinction between moral philosophy and psychology, revealing how emotions and intuitions guide our judgments more than rational principles, and investigate frameworks like Haidt’s moral foundations theory and Gray’s moral dyad theory. The course analyzes dark personality traits, their impact on moral behavior, and concludes by examining the relationship between morality and happiness, sex differences in moral judgment, and moral development across the lifespan.

1. Morality by Nature

In our introductory lecture, Dr. Rob Henderson presents morality not simply as a cultural construct, but as a built-in feature of human nature shaped by evolution to sustain cooperation. He illustrates this through the concepts of kinship selection and reciprocal altruism, tracing the roots of our moral intuitions. Together, we also see how moral judgment shapes perception through the Knobe effect, and consider the self-domestication hypothesis, the idea that humans became more peaceful by curbing persistently aggressive individuals throughout evolutionary history.

2. Moral Foundations

In lecture two, Dr. Henderson distinguishes moral philosophy—how we ought to act—from moral psychology—how we actually do. Through debates between consequentialism and deontology, illustrated by the trolley problem, we see that our judgments are often inconsistent and shaped less by principle than by intuition. The lecture concludes by exploring how emotions, unconscious processes, and evolved traits like disgust sensitivity quietly guide our moral views, with reasoning typically serving as post-hoc justification.

3. Moral Theories

In lecture three, we learn how Jonathan Haidt’s moral foundations theory expands morality beyond harm to five evolved foundations: care, fairness, loyalty, authority, and purity. We explore how liberals tend to prioritize care and fairness, while conservatives draw more evenly on all five, contributing to persistent political divides and mutual misunderstanding. The lecture concludes with Kurt Gray’s moral dyad theory, which argues that all moral judgments ultimately center on perceived harm involving an intentional agent and a suffering victim.

4. Judging Harm

In lecture four, we explore the psychology of blame and punishment, considering why accidental harm is judged differently from intentional wrongdoing. We introduce moral typecasting theory—the idea that people are often perceived as either “thinking doers” who cause harm or “vulnerable feelers” who experience it—and examine how this shapes judgments across gender, race, and political lines. We conclude by addressing the limits of moral dyad theory and the controversial idea that violence can sometimes be viewed as moral, setting up a discussion of psychopathy and dark personality traits.

5. Light vs. Dark

In lecture five, we analyze the dark triad—psychopathy, narcissism, and Machiavellianism—focusing on how these traits present in the general population through callousness, manipulation, and self-centeredness, and how they relate to moral behavior and well-being. We distinguish among the traits, consider their prevalence, and introduce contrasting ideas such as the light triad and counter-empathy, including schadenfreude. The lecture concludes by exploring how dark triad traits shape online behavior, suggesting that hostile individuals are more visible online rather than the internet fundamentally changing people’s behavior.

6. The Moral Life

In our sixth and final lecture, we explore the causal link between morality and happiness, highlighting behavioral evidence that doing good boosts well-being while wrongdoing reduces it. We examine sex differences in moral judgment and behavior, noting that women tend to judge violations more harshly and commit fewer crimes, and that these patterns may be linked to physical formidability, social anxiety, and evolutionary pressures. Lastly, we trace moral development across the lifespan, suggesting that wisdom and experience contribute to improved moral character.

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