The League of Nations did not live long. After a period of nearly 20 years, it ceased to exist, when the Second World War broke out. The membership of the League of Nations varied from time to time. At first it consisted of 42 member-States, e.g., England, France, Japan and other. Germany was excluded because she started the war.
Russia was not allowed to join it, because she had gone communist. U.S.A. refused to join it, because it did not serve her isolationist policy.
After the failure of the League to check Italian and Japanese aggressions and conquests in 1935 and in 1937, it was practically dead. The outbreak of the World War II put an end to the existence of the League.