Why do nations and individuals form international organization?

What is Heritage Site? What threats do stonehenge face? Is the North Atlantic Treaty Organization NATO an example of a multi national force? what country is the most organized? Did Theodore Roosevelt support the League of Nations? Who are European? Who is the first international president of Lions Club International? What is gender institution? How many countries presently make the United Nations? What are the 4 terms of treaty? Why did the League of Nations have little hope of success? Who is the head WTO? Why Germany and japan not permanent member of security council? What are sources of pollution? What is United Nations Write definition as shorter as you can? Why would nations that are not part of the EU adopt the euro as their currency? What European countries are not in NATO? Does a W9 have to be signed? What does Iceland export the most? When was Order of Merit of Mecklenburg-Vorpommern created?