We have most of the technology we need to combat the climate crisis - and most people want to see more action. But after three decades of climate COPs, we are accelerating into a polycrisis of climate, food security, biodiversity, pollution, inequality, and more. What, exactly, has been holding us back? Mike Berners-Lee looks at the challenge from new angles. He stands further back to gain perspective; he digs deeper under the surface to see the root causes; he joins up every element of the challenge; and he learns lessons from our failures of the past. He spells out why, if humanity is to thrive in the future, the most critical step is to raise standards of honesty in our politics, our media, and our businesses. Anyone asking 'what can each of us do right now to help?' will find inspiration in this practical and important book.