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.
For the League to enforce its will, it needed the support of its major backers in Europe, Britain and France. Yet France was one of the invaders and Britain was a major supporter of her. To other nations, it seemed that if you wanted to break League rules, you could. Few countries criticised what France and Belgium did.hile the League of Nations could celebrate its successes, the League had every reason to examine its failures and where it went wrong.