# Charles Duhigg on the writing AI can't touch, what GLP-1s really do to your brain, and the serendipity tax

An episode of [Summation with Auren Hoffman](https://invisiblenetwork.ai/podcast/1570644971), 16 Jun 2026, 1 h 04 min.

Audio: https://www.buzzsprout.com/1783651/episodes/19350531-charles-duhigg-on-the-writing-ai-can-t-touch-what-glp-1s-really-do-to-your-brain-and-the-serendipity-tax.mp3

Charles Duhigg is a Pulitzer Prize-winning journalist and staff writer at The New Yorker. He is the author of The Power of Habit, Smarter Faster Better, and Supercommunicators. His work focuses on the science of habits, productivity, decision-making, and human connection. In this episode of Summation, Charles and Auren discuss: • why producing the words is only 10% of an author's job, and the 90% AI can't do • what GLP-1s actually do to the brain • the serendipity tax: why you pay for five dead-end dinners to get the one that changes your life • the three skills that separate supercommunicators from everyone else You can find Auren Hoffman on X at @auren and Charles Duhigg on X at @cduhigg

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