Today, the High Seas Treaty received its 60th ratification, officially kickstarting the 120-day countdown until it enters into force. Covering almost half of the Earth’s surface, the high seas are shared by everyone but have lacked the governance needed to protect its biodiversity. The High Seas Treaty, also known as the BBNJ Agreement, will address this gap by establishing a governing body and legal process to create marine protected areas (MPAs) on the high seas and by setting standards for environmental impact assessments of high seas activities. The ratification of the High Seas Treaty will help bring order. If world leaders are serious about protecting 30% of the ocean by 2030, that requires ambitious action on the high seas.