evolutionary origins of our 'emotion default' to the secret history of the Challenger disaster, Parrish offers powerful mental models to make sense of any situation. And he reveals a simple, actionable method for smarter decision-making, starting today. Along the way, he shows that the secret to mental clarity lies not in how we approach the most high-stakes moments - but in our tiniest, most everyday decisions. It's a simple idea with startling implications: if you clear your head today, you change your life tomorrow. 'An indispensable guide,' James Clear, author of Atomic Habits. 'A game-changer,' Morgan Housel, author of The Psychology of Money. 'A must-read,' Mark Manson, author of The Subtle Art of Not Giving a F*ck. 'Incisive. Practical. Full of vivid examples, and enormously fun to read,' Jim Collins, author of Good to Great.