The league failed in Manchuria and Abyssinia. It was weak - the League's 'powers' were little more than going 'tut-tut'. Sanctions did not work. It had no army. always America - the strongest nation in the world never joined. Britain and France were not strong enough to impose peace on their own. Structure - the League was muddled, so it took ages to do anything. Members couldn't agree - but decisions had to be unanimous. This paralyzed the League. Depression - the world-wide Depression made countries try to get more land and power. They were worried about themselves, not about world peace. Unsuccessful - the more the League failed, the less people trusted it. In the end, everybody just ignored it. Members - the League's main members let it down. Italy and Japan betrayed the League. France and Britain did nothing to help it. Big bullies - in the 1920s, the League had dealt with weak countries. In the 1930s, powerful countries like Germany, Italy and Japan attacked weaker countries.
The league failed to resolve conflicts in the late 1920s and early 1930s. It never had a military alliance, and therefore could not enforce its decisions. This lead to an arms race, and there was nothing the league could do to prevent the second world war. well because they were not prepared to come to the defense of smaller countries, they concentrated on larger countries and that did not work well for their world disarmament plan.
There was a lot of resistance to the formation of and the U.S. involvement in the League of Nations.
The League of Nations no longer exists. It was replaced after WW2 by the United Nations.
The League of Nations was established to discourage international aggression, encourage co-operation, disarmament of weaponry, and to improve working and living conditions for people around the world (especially developing countries).