Why had international peace collapsed by 1939?

Which countries are on the waiting list to be a member of the EU? What is meaning of brundtland? An organization which today helps solve international conflicts and helps countries in humanitarian need is? What did the NATO do? How does the WTO prevent trade wars? How did Germany feel about the League of Nations? How many Scientists involved in the Kyoto Protocol? Has the UN ever had to intervene in any conflict involving Germany? The international organization created to preserve the peace after world war 2 was what? What is the purpose of the World Health Organization? What does the EU mean? Which organization works to improve payment agrrangements and other financial dealing between countries? When did the united nation officially come into existence? What is grade gl-5 at the united nations? What was wilsons plan for the formation of an association of nations that would keep peace called? What is UNICEFs mandate? Which certification organization offers the sscp and cissp certifications? Who is the president secretary general of the UN? How many international organizations does the US have? What heritage is Mesnick?