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.
There were many reasons why it had failed to keep peace: Not all countries joined the League, therefore it was weak, there were lack of troops, economic sanctions didn't work, there was betrayal, there was self-interest of leading members and decisions were slow.araguay appealed to the League of Nations, but the League did not take action when the Pan-American conference offered to mediate instead.         The war was a disaster for both sides, causing 100,000 casualties and bringing both countries to the brink of economic disaster.