Why is it okay to take the little shampoo bottles in hotels home with you but not the towels? And what stops people from taking the towels? Listen as political scientist Anthony Gill discusses the enforcement of property rights with EconTalk's Russ Roberts. Backing up their observations with insights from Adam Smith, Friedrich Hayek, and our everyday lives, they argue that the unenforced norms surrounding trust, propriety, and moral sentiments play a central role in building a flourishing society.

What do Shakespeare, Hollywood storytelling, and military special operations have in common? They all excel at inventing new plans, or improvising when we're facing radical uncertainty. Listen as professor of story science Angus Fletcher tells EconTalk's Russ Roberts how we've misdefined intelligence, equating it with data--driven reasoning in place of what he calls "primal intelligence"--the uniquely human ability to think and plan in situations with incomplete information. Drawing on years of work in Hollywood and working with elite military operators, Fletcher shows how narratives aren't just entertainment--they're the foundation of human intelligence. He reveals why military special operations personnel need to create new plans on the fly, why Shakespeare remains profoundly relevant to modern problem-solving, and why reading challenging literature literally rewires your brain for greater adaptability.

What if math isn't about grinding through equations, but about training your intuition and changing how your brain works? Mathematician and author David Bessis tells EconTalk's Russ Roberts that the secret of mathematics isn't logic--it's the way we learn to see. He explains why math books aren't meant to be read like novels, how great mathematicians toggle between images and formal proofs, and why we need a third mode of thought--"System 3"--that patiently retrains our intuition and the power of imagination. Bessis and Russ Roberts swap stories about the humility of great mathematicians, how Andrew Wiles "saw" the fix to his proof of Fermat's last theorem, and Ramanujan's dream-revelations that proved true.