Perimeter DeskPerimeter People / Founder, Farnam Street; author and podcast host
Shane Parrish founded Farnam Street and hosts The Knowledge Project. He writes about decision-making and mental models, authored Clear Thinking, and co-created The Great Mental Models book series. He also started the investment company Syrus Partners. His interviews examine how experienced people think and work, connecting business leadership and investing with habits that support clearer judgment in everyday situations.
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Interviews · Farnam Street
Shane Parrish explores decision-making, leadership and learning with investors, executives and other specialists, connecting the habits behind good judgment with business challenges and everyday choices.
Best forInvestors and business readers who want to improve their judgment, understand recurring decision errors and learn from the working methods of experienced practitioners.
Sources & further reading
Profile checked September 18, 2026. Editorial notes are Perimeter’s interpretation.