As humanity sits at an existential crossroads, this book introduces the need to build a nature-positive future to secure the functioning and stability of Earth systems essential to the survival and wellbeing of present and future human generations as well as the rest of Earth's amazing diversity of life. Alongside the change in climate, a more silent but equally terrifying crisis is unfolding: the loss of nature and biodiversity. These twin crises are in fact interconnected. After decades of ignoring our impacts on the natural world, we are beginning to realise that nature conservation is a security issue for humanity, and an imperative for intersectional and intergenerational justice. For these reasons, we must embrace a transition from a nature-negative to a nature-positive society, one that ensures human development and addresses today’s inequality, while conserving, restoring and sustainably benefiting from nature's resources and services. A Nature Positive future is one with more nature than today: more forests, more fish, more pollinators, more soil biodiversity, with benefits for the Planet and for us. In this book we define what becoming Nature Positive means from a variety of perspectives, what it takes to deliver it, and why it is possible and, most importantly, necessary. This book is essential reading for those concerned with conserving nature and sustaining our planet in the face of climate breakdown, biodiversity loss and ecological collapse.