International cooperation shapes some of the most consequential progress happening across the globe. This archive covers 151 stories about treaties signed, coalitions formed, and shared problems tackled by countries working together — from climate agreements and public health partnerships to nuclear safeguards and humanitarian aid. These are the moments when nations choose collaboration over conflict.
Liberia’s forests gained a powerful ally in 2014, when Norway pledged up to $150 million in development aid tied to a single condition: keep the trees standing. The deal covered the Upper Guinean rainforest, of which Liberia holds roughly 43 percent. It marked Norway’s first country-level results-based forest agreement in Africa.
The Amazon Fund launched in 2009, when Brazil built a public finance mechanism that paid for verified reductions in rainforest loss rather than promises. Managed by the national development bank and backed early by Norway, it has since supported more than 115 projects across the Amazon Biome. It became an influential model for paying to keep forests standing.
UNASUR was born on May 23, 2008, when all 12 South American nations gathered in Brasília to sign a single treaty binding a continent of more than 400 million people into one union. For a region long defined by rivalry and isolation, it was a rare written promise that their futures would be shaped together.
The African Union opened its doors on July 9, 2002, in Durban, South Africa, replacing the 39-year-old Organisation of African Unity with something more ambitious. Thabo Mbeki chaired that first Assembly, uniting all 55 African nations under a single continental body. It marked a shift toward Africa setting its own agenda — a project still unfolding.
In 2002, New Zealand Prime Minister Helen Clark traveled to Apia and stood before Samoa’s parliament to formally apologize for her country’s colonial harms. She named the 1918 influenza disaster, which killed roughly one in five Samoans after an infected ship was allowed to dock, and the 1929 Black Saturday killings. A rare act of accountability in the Pacific.
Macau’s handover at midnight on December 20, 1999 closed 442 years of Portuguese presence in the city and, with it, the last European colony in Asia. The transfer came not through conflict but through twelve years of patient negotiation between Lisbon and Beijing. It was the quiet final chapter of an empire that began in 1415.
EU enlargement in 1995 brought Austria, Finland, and Sweden into the union on January 1st, growing membership from 12 to 15 countries. Each nation put the question to its people first, with Austrians backing it most enthusiastically at 66% and Swedes narrowly approving at 52%. A quiet turning point for three longtime neutrals after the Cold War.
The International Coral Reef Initiative launched in December 1994, when eight nations — from Jamaica to Japan — met in the Bahamas and pledged the first global partnership devoted entirely to coral reefs. Reefs cover less than 1% of the ocean floor but shelter roughly a quarter of marine species, and until then, no international body had spoken for them alone.
The Law of the Sea treaty entered into force on November 16, 1994, giving the world its first comprehensive legal framework for the ocean. Negotiated by consensus over nearly a decade, it established 200-nautical-mile economic zones and declared the deep seabed the “common heritage of mankind” — a quietly radical idea still shaping ocean governance today.
The Convention on Biological Diversity became binding international law on December 29, 1993, committing nations to protect the planet’s living systems as “a common concern of humankind.” Born at the Rio Earth Summit a year earlier, it drew 168 signatures — the largest sign-on to any environmental treaty at that point. It reframed conservation from saving single species to safeguarding the full web of life.
