How successful was the League of Nations in the 1920s?

Deals with each of the following subquestions:1. How far did weaknesses in the League’s aims, structure, organisation and membership make failure inevitable? 2. What successes did the League have with humanitarian work (refugees, health, working conditions), and why were these important? 3. How and why did the League try to secure disarmament in the 1920s, and why did these attempts fail?4. What were the Leagues most notable successes and failures with regard to border disputes (e.g. Vilna 1920, Aaland Islands 1920–21, Corfu 1923, Bulgaria 1925)?