A counterintuitive and compelling argument that existing laws already protect the entirety of our oceans—and a call to understand and enforce those protections. Rowan Wright examines threats like climate change, pollution, overfishing, and plastic waste, and proposes a bold strategy of 100% ocean protection grounded in international law. The book highlights successful community and conservation projects, offers practical steps readers can take, and makes a case for systemic change to safeguard marine biodiversity and enable oceans to recover.