Sam Harris speaks with Michael Plant about the philosophy of happiness and effective altruism. They discuss the nature of well-being, Nozick's "Experience Machine" thought experiment, the validity of self-reported happiness data, the conflict between the experiencing self and the remembering self, Derek Parfit's "Repugnant Conclusion," the disconnect between moral intentions and consequences, why treating depression is more impactful than cash, the massive disparities in charitable impact, the potential effects of AI on human flourishing, the meaning crisis in a post-work future, and other topics.

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