Gavin McMahon: The Arrow of Coherence That Unifies Your Brand Storytelling Business of Story Podcast | Host: Park Howell Most brand stories fragment the moment they leave the marketing department. Gavin McMahon has a name for what stops that — and it may be the most important concept in business storytelling you haven't heard yet. Gavin McMahon is a recovering mechanical engineer, founder of a 25-year leadership and storytelling consultancy, and author of Story Business: Why Stories Rule the World and How They Can Reinvent Your Business. He joins Park Howell on the Business of Story podcast to introduce the Arrow of Coherence — the cause-and-effect narrative logic that connects every layer of an organization, from the C-suite to the front line, into a single governing story world. The problem Gavin diagnoses is one every business leader will recognize: the synonymous mess. Most companies tangle purpose, vision, mission, and strategy into one undifferentiated blob of corporate language. The result? Thousands of employees making daily decisions — small and large, value-creating and value-destroying — without a coherent narrative to guide them. In a pre-AI world, that fragmentation was a slow burn. Today, ungoverned AI scales that fragmented story at machine speed. The Arrow of Coherence is Gavin's answer. Borrowed conceptually from Nassim Nicholas Taleb's idea of an arrow of relationship, Gavin defines the Arrow of Coherence as the cause-and-effect logic that must shine through a brand — the same governing logic that makes the world of IKEA, Apple, or Patagonia feel coherent whether you encounter it in product design, customer service, or a thirty-year-old marketing campaign. When that arrow is present, every decision in the organization points the same direction. When it's absent, you have drift. In this conversation, Park Howell and Gavin McMahon explore why brand storytelling is not a marketing function but an act of world building — and why the best brands govern their stories through something closer to a show Bible than a brand guideline. They discuss why the CEO is the most underutilized storyteller in any company, how to build a coalition of the willing to embed story culturally rather than hierarchically, and why AI will amplify your narrative entropy unless a governing Brand Brain is installed first. Gavin also shares the two things he wishes he had known in the 1990s when he was leading digital transformation at Gartner — lessons about human decision-making, the stories people tell themselves, and why the truth is never driven by facts alone. What you will learn in this episode: What the Arrow of Coherence is and how to apply it to unify your brand story across every department and channel. Why most organizations suffer from a synonymous mess of purpose, vision, mission, and strategy — and the single narrative move that untangles it. How show Bibles differ from brand guidelines and why that distinction determines whether your story survives scale. Why your CEO is your most underutilized brand storyteller. How to use AI as a collaborator without surrendering your story to it. The three practical steps you can take today to start building your own Arrow of Coherence. Gavin McMahon is the author of Story Business: Why Stories Rule the World and How They Can Reinvent Your Business. Learn more at storybusiness.com. Park Howell is founder of The Business of Story, creator of the Story Cycle System™, and author of Brand Bewitchery and The Narrative Gym. Full episode show notes, transcript, and resources at businessofstory.com.

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