The outbreak of the Second World War stemmed from complex political, economic and international relations, and its repercussions were far-reaching, affecting all corners of the globe. This war not only changed the world pattern, but also had a profound impact on human history. Let's take a look at the causes and consequences of this war in order to better understand the development and changes in the world today
World War II (1939-1945) was the largest global war of the 20th century, involving several countries in Europe, Asia, Africa, and the Pacific.
The outbreak of this war broke out for a variety of reasons, including: Consequences of the First World War: The war that ended in 1918 led to Germany, Austria-Hungary, etcTerritorial losses and reparation burdens for defeated countries such as the Ottoman Empire and Bulgaria. This discontent set the stage for the outbreak of World War II.
Great Depression: In 1929, the world economy fell into the Great Depression, and the economic and social conditions of many countries deteriorated. Massive unemployment and poverty in countries such as Germany and Italy have provided the ground for extremist political forces.
Nationalism and expansionism: In the 30s of the 20th century, strong nationalist and expansionist sentiments emerged in Germany, Italy and other countries. Leaders such as Hitler (Germany) and Mussolini (Italy) tried to restore the honor and strength of the country through foreign aggression.
Unequal International Order: The global political landscape of the 1930s was unstable, and the League of Nations was unable to effectively maintain world peace and security. This makes it easier for some countries to risk aggressive actions.
Personnel**: The war has killed an estimated 70 million people, including civilians and military personnel. In addition, the war has led to a large number of missing people and homelessness. Economic devastation: The war has destroyed cities and infrastructure in many countries, resulting in massive property damage. After the war, countries needed to invest huge sums of money to rebuild. 
Changes in the political landscape: After the war, the political landscape of defeated countries such as Germany and Japan underwent major changes. Germany was divided into two countries, East and West, occupied by the Soviet Union and the Western Allies, respectively. Japan was forced to accept unconditional surrender, and its territory and military power were limited. The establishment of the United Nations: In order to maintain world peace and security, in 1945, 50 countries signed the Charter of the United Nations in New York and established the United Nations. Cold War: After the end of World War II, the United States and the Soviet Union became the two global superpowers. The decades-long Cold War between them led to a series of international conflicts and crises. 
Colonial independence: After the war, many former colonial countries began to fight for independence and become sovereign states. This process lasted until the 70s of the 20th century, marking the end of the era of imperialism. After the end of World War II, the world entered a new era. War has taken a heavy toll on nations, but it has also inspired people to work for peace, security and prosperity. Through the establishment of the United Nations, the rise of colonial independence movements, and the end of the Cold War, human society gradually moved towards a more peaceful and inclusive direction.