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World War 2 Causes, Impact, and Effects

Last Updated : 21 Feb, 2024
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World War 2, spanning from 1939 to 1945, stands as one of the most pivotal and devastating conflicts in human history. Fueled by complex geopolitical tensions, economic strife, and ideological clashes, the war involved the majority of the world’s nations and reshaped the global order. Triggered by the aggressive expansionist policies of Adolf Hitler’s Nazi Germany, the conflict escalated into a truly global conflagration, involving major powers such as the Allied Forces, led by the United States, the Soviet Union, and the United Kingdom, against the Axis Powers, comprised primarily of Germany, Italy, and Japan.

World War 2 happened after a long and tense 20-year break and was, in some ways, connected to issues from the First World War. It is known as the deadliest and largest war ever, with around 40 to 50 million people losing their lives. It was a very significant and tragic event in history.

World War 2

Like its predecessor, World War 2 was also a major turning point in the 20th century. It had significant effects on the world. It made the Soviet Union stronger and gave it control over countries in Eastern Europe. It also helped communist forces take control of China. Most importantly, it shifted the balance of power in the world from Western European countries to the United States and the Soviet Union. In this article, you will learn about the World War 2 history, its causes and consequences.

World War 2 had profound and lasting consequences, reshaping political, social, and economic landscapes across the globe. The establishment of the United Nations aimed to prevent future global conflicts, and the war’s aftermath led to the beginning of the Cold War, a geopolitical struggle between the United States and the Soviet Union that persisted for decades. The war’s impact is felt to this day, influencing international relations, human rights, and the collective memory of nations that endured its hardships.

World War 2 History

World War 2, was a global conflict with its roots in the aftermath of World War 1 and the rise of aggressive regimes, notably Nazi Germany and Imperial Japan. It began with the invasion of Poland by Germany in 1939, leading to the declaration of war by Britain and France. The war featured two major alliances, the Axis and Allies World War 2, and saw significant turning points, the major battles of World War 2 such as the Battle of Stalingrad and the D-Day invasion. The war brought about unimaginable horrors, including the Holocaust and countless war crimes. It ended with the surrender of Japan in 1945, following the dropping of atomic bombs on Hiroshima and Nagasaki.

World War 2 reshaped the world, leading to the establishment of the United Nations, the start of the Cold War, and the post-war rebuilding of Europe through initiatives Like the Marshall Plan. It remains a defining event in human history, with profound and overpowering consequences.

Causes of World War 2

World War 2 was a complex and multifaceted global conflict with a variety of interconnected causes. While it is challenging to pinpoint a single trigger, several key factors contributed to the outbreak of the war. Here are some of the causes of World War 2 explained in detail.

1. The Versailles Treaty: The Treaty of Versailles placed severe restrictions on Germany following World War I, holding it accountable for the conflict, requiring it to make reparations, and reducing its military power. In Germany, this humiliation served as fuel for ultra-nationalism.

2. Growth of Fascism: Fascist beliefs that promised effective government and protection from communism gained traction in the 1920s, which helped Italy see the ascent of leaders like Benito Mussolini.

3. Growth of Nazism: Racism, the repeal of the Treaty of Versailles, and the enlargement of German territory were all supported by Adolf Hitler’s Nazi party. In 1933, Hitler was elected German Chancellor and instituted a dictatorship.

4. The appeasement policy: To prevent war, Western nations like France and Britain sought appeasement, allowing Hitler’s aggressive activities to continue unchecked. The 1938 Munich Agreement serves as a noteworthy illustration of this methodology.

5. The League of Nations’ failure: The League of Nations was established to avert war, but it was unable to do so since not all nations joined and it lacked the military might to put an end to aggression.

6. 1929 Great Depression: Totalitarian and imperialist governments grew stronger as a result of the 1930s worldwide economic crises in Europe and Asia. Political power shifted as a result of it, especially in Germany, Italy, and Spain.

7. Anti-Semitism and the Holocaust: The deep-seated anti-Semitic beliefs of the Nazi regime played a role in the persecution and systematic extermination of six million Jews during the Holocaust. The genocide added a horrifying dimension to the war and further underscored the brutality of totalitarian regimes.

Consequences of World War 2

The consequences of World War 2 were vast and multifaceted, profoundly shaping the post-war world in political, economic, social, and cultural dimensions. Following World War 2, Britain and France faced a multitude of both home and foreign challenges. Their many colonies were too little for them to hold onto for very long. As a result, in the postwar era, colonialism ended in Africa and Asia.

  • Due to World War 2, several countries and continents saw changes in their status.
  • The loss of Britain and France as superpowers was one of the direct consequences of World War 2.
  • Colonialism and imperialism started to fade.
  • The two new global superpowers were the United States and the Soviet Union.
  • The United Nations Organization establishment was also influenced by World War 2.
  • After Germany and Japan were predicted to lose World War 2, financial arrangements were made for the conflict’s aftermath at the Bretton Woods Conference.
  • As a result of World War 2, plans were developed for the IMF to support short-term payment processing imbalances in order to stabilize exchange rates and for the IBRD (World Bank) to provide long-term funding to nations who were in dire need of aid.
  • The US dollar was also designated as a global reserve currency following World War 2.
  • It was one of the most important consequences of the Second World War.
  • As a basis for nations to cooperate in pursuit of enduring peace, the United Nations Charter upholds the aspirations and goals of humanity.

After the war, nations had the daunting burden of rebuilding. The state of the economy was dire, and infrastructure needed to be fixed. Nonetheless, economic prosperity and stability were the results of the labor-intensive post-war reconstruction. The world learned a valuable lesson during World War 2 about the terrible effects of conflict.

Impacts of World War 2

The impacts of World War 2 were very far-reaching, shaping the course of history for decades to come. From geopolitical realignments to socio-economic transformations, the war left an indelible mark on the world. Here is an introduction to the key impacts of World War 2.

  • The United Nations: Aiming to avert future hostilities, the United Nations was founded. It resembles a club of nations cooperating to uphold international peace and security. The purpose of the UN is to prevent wars and advance peace.
  • Technological Progress: The war’s urgency sped up technological advancement. Advances in science and industry were made possible by the emergence of innovations such as computers, jet engines, and nuclear energy.
  • Cold War: Two superpowers, the United States and the Soviet Union, began a period of political rivalry known as the Cold War following World War 2. Rather than going to war, they engaged in a fierce rivalry that influenced world politics for many years.
  • Destruction: There was devastation left behind by World War II. Cities were turned to rubble in their entirety, and the economy was in ruins. Rebuilding what was lost left communities with severe emotional and physical scars.
  • Perishing Lives: Millions of lives were lost in the war. The fighting claimed the lives of innocent citizens and soldiers from several different countries. Families were shattered, and the global community lamented the staggering loss of life.
  • The Holocaust: History’s most horrifying chapter was the Holocaust. Approximately six million Jews were methodically killed in concentration camps during the Nazi rule of Adolf Hitler. The horrors of human brutality are still vividly brought to light by this holocaust.
  • Global Shifts: The globe map was altered by the war. New nations developed as old empires fell. 
  • Women’s Role: The conflict led to an expansion of women’s roles. When men were on the front lines, women challenged social norms by taking on roles that had previously been filled by men. The movement for women’s rights was made possible by this.
  • Remodeling: After the war, nations had the daunting burden of rebuilding. The state of the economy was dire, and infrastructure needed to be fixed. Nonetheless, economic prosperity and stability were the results of the labor-intensive post-war reconstruction.
  • Takeaways Acquired: The world learned a valuable lesson during World War 2 about the terrible effects of conflict. It emphasized how crucial diplomacy, international cooperation, and peaceful conflict resolution are to prevent the kind of extensive devastation that the war had caused.

World War 2- Watershed Moments

World War 2 was marked by numerous significant moments that significantly influenced the course of the conflict. Here are some crucial turning points of the war:

1. Battle of Stalingrad (1942-1943)

This brutal battle between Nazi Germany and the Soviet Union marked a turning point on the Eastern Front. The Soviet victory halted the German advance into Russia and shifted the momentum in favor of the Allies. It was a significant blow to Hitler’s forces and marked the beginning of the German retreat.

2. Battle of Midway (1942)

Fought between the United States and Japan in the Pacific Theater, the Battle of Midway was a naval confrontation that turned the tide against Japan. The U.S. Navy’s victory at Midway weakened Japan’s naval power and marked the beginning of the end of Japanese expansion in the Pacific.

3. D-Day Invasion (1944)

The Allied invasion of Normandy on June 6, 1944, also known as D-Day, was a massive coordinated assault by American, British, and Canadian forces against Nazi-occupied Western Europe. This successful invasion established a crucial foothold in France, leading to the liberation of Western Europe from Nazi control.

4. Battle of Britain (1940)

The Battle of Britain was a pivotal air campaign where the Royal Air Force defended the United Kingdom against sustained German airstrikes. Britain’s successful defense prevented a German invasion, forcing Hitler to abandon plans to conquer Britain and turning the tide in favor of the Allies.

5. Atomic Bombings of Hiroshima and Nagasaki (1945)

The use of atomic bombs by the United States on the Japanese cities of Hiroshima and Nagasaki brought about the swift and unconditional surrender of Japan, effectively ending World War 2 in the Pacific.

6. Soviet Entry into the War against Japan (1945)

The Soviet Union’s declaration of war against Japan in August 1945, shortly after the atomic bombings, accelerated Japan’s defeat. The Soviets quickly gained ground in Manchuria, further pressuring Japan to surrender.

7. The Yalta and Potsdam Conferences (1945)

These conferences held among the Allied leaders determined the post-war order and the division of Germany and Europe. They set the stage for the start of the Cold War between the Soviet Union and the Western Allies.

World War 2 Timeline

World War 2, a global conflict that lasted from 1939 to 1945, involved most of the world’s nations and was marked by significant events that shaped modern history. Here’s a concise timeline of this monumental war:

Year

Events

1939

September 1: Germany invades Poland, triggering the start of World War 2.

September 3: Britain and France declare war on Germany.

1940

May 10: Germany invades France, Belgium, Luxembourg, and the Netherlands.

June 22: France signs an armistice with Germany.

July – October: Battle of Britain, the first major campaign fought entirely by air forces.

1941

June 22: Germany invades the Soviet Union in Operation Barbarossa.

December 7: Japan attacks Pearl Harbor, leading the United States to enter the war.

1942

June 4-7: Battle of Midway, a turning point in the Pacific Theater.

August 23: Battle of Stalingrad begins, one of the deadliest battles in history.

1943

July 10: Allied forces land in Sicily, beginning the Italian Campaign.

November 28 – December 1: Tehran Conference where Roosevelt, Churchill, and Stalin plan the final strategy for the war against Nazi Germany and Japan.

1944

June 6: D-Day, Allied forces land on the beaches of Normandy, France.

December 16: Battle of the Bulge, the last major German offensive on the Western Front.

1945

February 4-11: Yalta Conference, the Big Three discuss post-war reorganization.

May 7: Germany surrenders unconditionally to the Allies.

August 6 and 9: The United States dropped atomic bombs on Hiroshima and Nagasaki.

September 2: Japan formally surrenders, marking the end of World War 2.

This timeline encapsulates the key milestones of World War 2, a war that redefined geopolitical boundaries and had profound impacts on global history.

India and World War 2

During World War 2, India played a significant role, although it wasn’t a direct combatant. India was under British colonial rule at the time, and its involvement in the war was as a part of the British Empire. The impact of the war on India was multifaceted and had wide-ranging consequences for the country.

  • Contribution: India made substantial contributions to the Allied war effort. Over two million Indian soldiers served in various theaters of the war, including North Africa, the Middle East, and Southeast Asia. These soldiers fought against Axis powers like Germany, Italy, and Japan.
  • Economic Impact: India’s economy was heavily strained due to the war. The war resulted in increased demands for resources and funds, leading to inflation and economic difficulties. Additionally, India was used as a supply and recruitment base for the Allies, further straining its resources.
  • Political Implications: The war also had significant political implications for India’s independence movement. The Indian National Congress, under the leadership of figures like Mahatma Gandhi and Jawaharlal Nehru, used the war as an opportunity to push for India’s independence from British rule. The Quit India Movement in 1942 was a significant movement against British colonialism during this time.
  • Post-War Impact: Post-war, the role played by Indian soldiers and the economic hardships faced during the war played a pivotal role in changing the dynamics between the British Raj and India’s nationalist leaders. The increasing demand for independence gained momentum, leading to India’s eventual independence in 1947.

World War 2 Lessons Learned

World War 2 was a major event that changed the world, impacting societies, economies, and global politics. It ended with big changes like new powerful countries and groups formed to promote peace. The war caused a lot of suffering, destruction, and loss of life, changing the paths of many nations and people.

Reflecting on World War 2, we must remember its important lessons. The war showed how terrible conflicts can be, encouraging everyone to work together for peace, cooperation, and to protect human rights. Its legacy teaches us the value of diplomacy, teamwork between countries, and solving problems peacefully, reminding us of the terrible price of war and the need to avoid such tragedies in the future by working together.

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World War 2 – FAQs

What were the main causes of World War 2?

The major World War 2 causes were unresolved issues from WW1, aggressive actions by Germany and Japan, and the failure of the League of Nations.

What were the effects of Second World War on Germany?

The effects of World War 2 on Germany were devastating. Germany faced immense destruction, loss of territory, economic collapse, and severe social upheaval.

What were the consequences of World War 2?

The World War consequences were far-reaching, including widespread destruction, loss of life, economic devastation, the redrawing of global political boundaries, the rise of new superpowers, advancements in technology and medicine, and the establishment of international institutions for peace and cooperation.

When did World War 2 start and end?

The World War 2 started in Semptember 1939 and ended in September 1945. It was a crucial moment for the whole world as it marked for significant changes in the world history.

What were the effects of World War 2 on families?

World War II had a profound impact on families, causing separation, loss of loved ones, displacement, trauma, and economic hardships. Many families faced the challenges of coping with the absence of family members involved in the war and the struggles of post-war recovery.

Which countries were involved in World War 2?

Major participants of World War 2 included the Allies (the United States, the Soviet Union, the United Kingdom, and France) and the Axis powers (Germany, Italy, and Japan).

How did World War 2 impact global politics?

The second World War led to significant shifts in global power, notably the rise of the United States and the Soviet Union as superpowers and the beginning of the Cold War.

What were some significant battles of World War 2?

Key battles of the World War 2 included the Battles of Stalingrad, Midway, Normandy (D-Day), and the Battle of Britain, each pivotal in the war’s outcome.

How did World War 2 end? What were its consequences?

The second World War ended with the unconditional surrender of Axis powers in 1945, leading to the establishment of the United Nations and significant geopolitical changes worldwide.



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