One reason for the failure of the League of Nations was the attitude of the members. The Britain only cared about protecting their empire and building their trade. The French were worried about another attack from Germany only. Britain and France saw the League as a great tool to practice their own wants, and their biased foreign policy, however, that was totally against the “idea” of the league. The U.S.A practised the policy of isolationism and so did not join the League of Nations at all. As U.S.A was the one who introduced the League of Nations, it was very controversial when U.S.A did not join LON. Everybody knew that the League needed the U.S.A’s money and troops so that it could work effectively. As America was the world’s most powerful nation, this was a serious blow to the prestige of the League. The countries did not practise what it preached and did not put into practise the 26 articles of LON and so in this aspect, the League had failed to promote international cooperation. Therefore, one reason for the League’s failure was the attitude of the members because they were more concerned about their own affairs than fulfilling the aims of the LON.
One reason for the failure of the League of Nations was membership and mandates. The League began with 42 nations. By 1939, there were over 50 members. But some powerful nations had left the League or never joined. For example, Italy joined in 1919 but left in 1937, Japan joined in 1919 but left in 1933. Germany was not allowed to join the League in 1919 and only joined in 1926. As Germany had started the war, according to the Treaty of Versailles, one of her punishments was that she was not considered to be a member of the international community and, therefore, she was not invited to join. This was a great blow to Germany but it also meant that the League could not use