The document discusses the League of Nations, its aims and structure, and factors that influenced its effectiveness. It examines why some countries like Germany, Russia and the US did not initially join. It outlines the League's main strengths like its inclusive membership, and weaknesses such as lacking enforcement powers and unanimous decision making. Specific cases like Corfu, the Kellogg-Briand Pact, and responses to events in Bulgaria, Poland and the Ruhr Valley are examined in terms of what they reveal about the League's impact.