The definition of symbiosis has varied among scientists. Some advocated that the term symbiosis should only refer to persistent mutualisms, while others thought it should apply to any type of persistent biological interaction (in other words mutualistic, commensalistic, or parasitic).
The League of Nations failed for a couple of reasons: 1  The United States was not part of it. 2  More importantly, the countries in the League did not take the idea of collective security seriously.3  When countries attacked others, nothing was done. 4  For example, Italy attacked Ethiopia and Japan attacked China. The United States was not part of it. 2  More importantly, the countries in the League did not take the idea of collective security seriously. 3  When countries attacked others, nothing was done. 4  For example, Italy attacked Ethiopia and Japan attacked China. 5  In both cases, nothing serious was done.
The final meeting of the League was held on April 12, 1946 with official close of business on April 20, 1946. For all intents and purposes though, the League effectively stopped full-time business with the start of World War II, and probably should be considered done with the creation of the United Nations in 1945. Confer Wikipedia for a more complete description of the demise http://en.wikipedia.org/wiki/Lea...