The Zero-Sum Illusion

The Zero-Sum Illusion combines psychology, leadership, and hard-earned wisdom into a practical guide for turning conflict into collaboration. Whether you lead a team, a company, or simply want better relationships, this book provides practical tools for building trust across differences and finding common ground. Jay Van Bavel, Ph.D., Professor of Psychology, New York University, Director, Center for Conflict & Cooperation, Author of The Power of Us

Balancing rigorous behavioral science with a series of applied techniques, The Zero-Sum Illusion describes how everyday defensive impulses impair effective leadership and how these tendencies can be practically addressed to navigate workplace stressors and build psychological resilience. Grant shows us that stepping out of our defensive armor is not a sign of weakness but rather a resource that can support personal growth, purposeful connection, and collaborative success. - Heidi A. Wayment, Ph.D., Regents Professor of Psychology at Northern Arizona University, and Jack J. Bauer, Ph.D., Professor of Psychology at the University of Dayton, co-creators of the measures and theoretical construct of the quiet ego as well as co-authors of the The Quiet Ego

An exceptional look at what it truly takes to drive elite collaboration. By breaking down the ‘Me, Them, Us’ framework, Grant delivers the definitive corporate strategy for dismantling internal silos and unlocking world-class results. - Simon Hartley, Founder & CEO of Be World Class Group, Author of 13 books, Keynote speaker, Elite sports psychology consultant and high-performance coach

Grant reminds us of the human condition and how a deeper understanding of self and others can create bridges between us to the benefit of all. He matches personal experience with academic validation. He guides the reader through both the why and how in life with clear prose and check lists. The book is essential reading for any aspiring or actual leader.” - Roger Martin-Fagg, Behavioural economist and strategic consultant, Author of Making Sense of the Economy

Most people dramatically underestimate what is possible when we stop seeing life as a competition and start seeing it as an opportunity for mutual flourishing. Grant provides a compelling case for moving beyond zero-sum thinking and practical tools for creating a more compassionate, prosperous, and flourishing world. A thoughtful, practical, and deeply hopeful contribution to the conversation about how we flourish together.” - Brian Johnson, Philosopher and Heroic CEO, Author of Areté Activate Your Heroic Potential

Dr. Grant Ballard-Tremeer is the founder of E Co., a climate finance consultancy based in London, and serves as a board advisor to multiple companies. Through his work advising global organizations, he has consistently seen that the greatest breakthroughs occur not when one party “wins” a negotiation, but when genuine connection allows teams to see past the illusion of a zero-sum game.

A keen runner, Grant balances his professional life with strength training, traveling, and hiking. He loves sci-fi and coding. He still dreams of dancing-even if he isn’t currently taking to the floor!-and enjoys life in the UK with his wife and their two teenage children.

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