How did World Wars and Cold War impact in international relation?

The importance of the First World War and the Second World War and their impact on international relations.

 20. The 21st century saw seismic events that reshaped global social relations. While the two world wars caused great damage to people and property, the long Cold War, in which ideological and geopolitical tensions took place, became a crime in the history of world diplomacy. These catastrophic events left an indelible mark on the international stage, redefining the concepts of power, peace, and cooperation. Two world wars, especially World Wars I and II. World War II had a major and lasting impact on international relations; reshaped world order, politics, and interaction between countries. Let's examine their importance and effects in detail:

First World War:

1. Catalyst of Change:  The outbreak of World War I (commonly known as the "Great War") in 1914 was a major turning point in international relations. It emerged from a complex web of alliances, imperial rivalries, and ethnic rivalries (Margaret Macmillan, War to End Peace: The Road to 1914, 2013).
2.   Treaty of Versailles and the German Conflict: The Treaty of Versailles, signed in 1919,  ended World War I and marked an important agreement for Germany. The agreement and its aftermath would dominate the world stage for years to come (David Stevenson, 1914-1918: A History of the First World War, 2004).
3.  Formation of the League of Nations: The First World War led to the formation of the League of Nations; The first international organization created to prevent future conflicts. This was an important step towards stability and diplomacy(E.H. Carr, The Twenty Years' Crisis: 1919-1939, 1939).
4.  Redrawing of National Borders: The redrawing of national borders in Europe after the Second World War led to the disintegration of nations and the establishment of new states. This change had a lasting impact on the dynamics of the region (Richard C. Hall, Balkan Breakthrough: Battle of Dobroj, 1918,2010).
5. The Fall of Empires: World War I led to the collapse of empires, including the Austro-Hungarian Empire and the Ottoman EmpireEmpire 2. This led to the establishment of new states and the restructuring of the region (Richard C. Hall, Balkan Breakthrough: The Battle of Dobroj, 1918, 2010).

 6  Effects on the global economy: The war had a huge impact on the economy, including reparations, debts, and financial instability. It led to the Great Depression and similar economic policies in the interwar period(Charles S. Meyer, The Treaty of Versailles: A Reassessment  75 Years Later, 1998).      

                                             World War II:

1. The Rise of the Superpowers:  World War II from 1939 to 1945. During World War II, superpowers such as the United States and the Soviet Union emerged as the dominant powers in society worldwide. The war changed the world's balance of power (John Lewis Gaddis,  Cold War: A New History, 2005). 2.  United Nations: World War II led to the establishment of the United Nations (UN) in 1945; its mission is to promote peace, cooperation, and international security. The United Nations became the main source of international warfare (Brian Urquhart, Ralph Bunche: An American Odyssey, 1993).
2.   Nuremberg Trials: The Nuremberg Trials, held after the Second World War, set an important precedent in terms of international law and accountability. They found that individuals, including political leaders, could be held responsible for war and crimes against humanity (Douglas Walton,  Nuremberg Trials and Crimes Against Humanity, 2008). Allies, II. They held the Nuremberg Trials against representatives of defeated Nazi Germany for planning and carrying out invasions of other countries and atrocities against their citizens during the World War II Session.