In this episode of CSS Breakdown: Book by Book, Season 09, Episode 3, we dive into Chapter 3 of Norman Lowe's 'Mastering Modern World History (Fifth Edition)' to explore the fascinating and ultimately tragic story of the League of Nations. Join us as we uncover the League's origins as a brainchild of American President Woodrow Wilson and other world statesmen, and its ambitious aims of maintaining peace through collective security and encouraging international cooperation. We'll detail its unique organizational structure, including the General Assembly, the Council, the Permanent Court of International Justice, the Secretariat, and various commissions. The episode will highlight the League's early successes in the 1920s, such as resolving minor international disputes and its valuable economic and social work, including aiding thousands of refugees and combating epidemics. However, the core of our discussion will focus on the profound reasons behind its ultimate failure to preserve peace, particularly during the 1930s. We'll explore critical factors like its close link to the Versailles Treaties, the significant absence of powerful nations such as the USA, Germany, and the USSR, serious weaknesses embedded in its Covenant, and the devastating impact of the world economic crisis. We'll specifically analyze how challenges like the Japanese invasion of Manchuria and the Italian invasion of Abyssinia exposed its fatal flaws and the reluctance of leading members, notably Britain and France, to enforce its authority. Finally, we'll discuss the nuanced historical perspective that, despite its failure to prevent World War II, the League served as a crucial blueprint and experimental phase for future international cooperation, notably influencing the foundation and structure of the United Nations.