Early international agreements and their later expansion
World War II: treaties and agreements on territorial changes, frontiers, and other matters arising out of the war
Treaties and agreements on nuclear weapons and cooperation in Antarctica, on the seabed, and in outer space
Europe: steps toward integration among non-communist states
The Organization for Economic Co-operation and Development (OECD)
The North Atlantic Treaty Organization (NATO)
East-West treaties of 1970-72
The commonwealth: commonwealth regional groupings and the treaties of Great Britain
The French community ("communaute")
South and East Asia and the Pacific area
The "third world": attempts at achieving a union.