It Belongs to All of Us: The High Seas Treaty's Global Impact

It belongs to all of us - As the world's largest shared marine space, the high seas have long been a domain of international cooperation and ecological significance. The High Seas Treaty, officially known as the Agreement on the Conservation and Sustainable Use of Marine Biological Diversity of Areas Beyond National Jurisdiction, represents a transformative step toward ensuring these waters are protected for future generations. Nathalie Rey, Senior Strategy Advisor at the High Seas Alliance, emphasizes its universal importance: "It belongs to all of us—these vast oceans are a common heritage, not just a resource for any single nation." The treaty, which took over two decades to finalize, addresses the need for equitable governance and environmental safeguards in regions beyond national control.

A Global Framework for Ocean Protection

Until the High Seas Treaty was signed, international waters operated under a patchwork system where different organizations managed separate aspects of ocean use. Rey explains, "It belongs to all of us, yet we lacked a unified legal structure to ensure their protection." This gap allowed unchecked activities like overfishing, pollution, and deep-sea mining, which threatened marine biodiversity and the planet's ecological balance. The treaty now establishes a comprehensive legal framework, creating marine protected areas and requiring environmental assessments before resource extraction projects are approved.

The Significance of a Unified Approach

The treaty’s ratification in 2026 marks a critical milestone in global ocean governance. "It belongs to all of us, and this agreement ensures that no single country can exploit it without accountability," Rey notes. With over 190 nations involved, the treaty bridges the divide between regional fisheries bodies and international maritime organizations, fostering a cohesive strategy to conserve the high seas. The high seas cover nearly half the Earth’s surface, hosting around 2,000 new marine species each year and playing a vital role in climate regulation and global food security.

Its implementation introduces mandatory protocols for activities such as deep-sea mining and geoengineering, ensuring environmental standards are met. Rey highlights the treaty’s ability to balance conservation with economic development, stating, "It belongs to all of us—so the benefits of marine resources should be distributed fairly." The agreement also provides support for developing nations, offering funding and infrastructure to help them access and manage marine genetic resources, such as those found in deep-sea sponges with potential medical applications.

Overcoming Political and Global Challenges

Securing the treaty required a massive international effort, overcoming political hurdles and global crises. "It belongs to all of us, and achieving this agreement was a long journey," Rey recalls. The process spanned over two decades, with the final agreement adopted in 2023. France played a pivotal role in accelerating momentum, framing the treaty as a core goal of its 2025 UN Ocean Conference. "Their leadership helped unite the global community around this cause," Rey adds. The treaty’s rapid ratification—reaching 60 signatories within two years—demonstrates the growing consensus on the need for ocean conservation.

Despite the challenges, the treaty’s success underscores the importance of collective action. "It belongs to all of us, and this agreement ensures that we can protect it together," Rey says. The treaty aligns with broader global commitments, such as the UN Decade on Ocean Science for Sustainable Development, offering a practical tool for implementation. By integrating marine protection into international law, it sets a new standard for safeguarding the Earth’s shared oceans and promoting fairness in their use.

Monitoring and Enforcement: A Technological Leap

While the treaty’s legal framework is robust, Rey acknowledges the challenge of enforcement. "It belongs to all of us, but ensuring compliance requires advanced technology and global collaboration," she explains. The agreement mandates monitoring systems to track activities in the high seas, leveraging satellite data and AI to detect illegal fishing and pollution. These tools are essential for holding nations accountable and maintaining the treaty’s effectiveness in protecting biodiversity. The emphasis on transparency and accountability is a key component of its success, ensuring that the high seas remain a common asset for all.

"It belongs to all of us—this treaty is a landmark in ensuring the high seas are protected for the benefit of everyone." – Nathalie Rey, High Seas Alliance