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.
Failure over the invasion of Manchuria in 1931. The Japanese government was finding it increasingly hard to control its army during the 1920s and early 1930s in the run up to the 1931 invasion of Manchuria:he Reasons for the Leagueâs Failure to stop the invasion. The Chinese government protested to the League of Nations, but several of the Leagueâs weaknesses came together and meant that they could not stop the Japanese invasion: 1  The League was too slow.