What if the ideas we need most are the ones we're not allowed to think?

“A powerful exploration of how we got here, what’s holding us back, and an invitation to step into the unfamiliar to open up new ways of thinking.”

“Just what the sustainability movement needs right now.”

“Don’t send your children to school until you’ve read this book.”

“This isn’t a book on sustainability. It’s a book on a better future.”

“Never before has a book made me so deeply angry and shocked to my core, while giving me such hope and optimism for the future.”

“Between its covers, this book will transport you from understanding the fundamental concepts of the world to taking specific actions that will make it better.”

“I came away excited about the future, and ready to throw the word sustainability out the window.”

“A funny, disarming way to help you think in colour, rather than black and white.”

“A fabulous book - I’d encourage anyone to dive in and be taken on an adventure.”

“Tom’s warmth, compassion and super sharp insights make this an enthralling read.”

“It has the wisdom and breadth of a lifetime’s studies combining so many interconnected strands.”

“The solid ground is pulled from under us, opening up the opportunity for freedom and a lightness to expand our thinking.”

“An opportunity to consider what it really means to be human and to act in accordance with our true nature.”

“What I loved most is that the book never closes a thought prematurely. Just when we might want to tick a checkmark, it keeps opening, giving invitations to think further.”

“Tom Greenwood writes the way the best thinkers think — by wandering into territory that doesn't belong together and showing us why it does.”

“Overton's Garden kept catching me off guard. Just when I thought I knew where it was heading, it turned a corner into something I hadn't considered — and as a sustainability scientist and philosopher, I've been sitting with many of the questions he raises for a long time.”

“The questions he raises are deep, thoughtful, and far reaching.”

“It's about what it means to be human in our times: how to live at the edges, embrace the complexities and ambiguities of the challenges we face, and still engage, love, and live — for and with people and the planet.”

“To me, this book is about what becomes possible when we stop letting the familiar define the edges of the real.”

“A book that helps broaden thinking by pointing out what should be obvious... but somehow isn't”

“Having felt awkwardly on the fringes of the sustainability world for some time, it encouraged me to see the bigger picture of my social impact work, and keep going!”

“Pretty far out thinking and yet deeply common sensical. Why have we not been thinking in these terms already?”

“A book that lifts the blinds and shows you who put them there in the first place. It swaps fear for clarity, and clarity for actual agency.”

“Most sustainability books tell you what to do. This one tells you who's been telling you what to do, and why that's a much better question.”