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.
Failures of the League. 1  Despite its success in settling disputes between small nations, the League failed to preserve peace among the major powers. 2  It was unable to stop any of the serious acts of aggression which took place in the inter-war period and this failure contributed to the outbreak of the Second World War.ailures of the League. 1  Despite its success in settling disputes between small nations, the League failed to preserve peace among the major powers. 2  The world economic crisis which began in 1929 contributed to the Leagueâs decline.