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During the early 20th century, the Western Hemisphere was dominated by a few major powers, including Great Britain, France, and the Netherlands, due in large part to the impact of industrialization and the expansion of their overseas colonies. These countries played a dominant role in the global political order, exerting influence and control over many other regions around the world.
At the same time, the traditional land empires of the Ottoman, Austro-Hungarian, Russian, and Qing dynasties were beginning to decline, as new powers emerged on the global stage. Japan, following the Meiji Restoration of 1868, underwent a rapid modernization and industrialization process, becoming a major economic and military power in the region. Similarly, the United States, having recently acquired the Philippines, Puerto Rico, and Guam as territories, was also rising as a major global player. Overall, the early 20th century was marked by significant shifts in the global balance of power, with Western powers consolidating their dominance and new players emerging as major actors on the world stage. This shift in powers drove much of the political, cultural, and economic action of the 20th century, as the Western World continued their domination.
Reading due next class with graphic on MoeCampus: 7.1 Shifting Power Reading.pdf
World War I, erupting in July 1914, stemmed from a volatile mix of long-term tensions and a dramatic short-term trigger. Nationalism fueled rivalries, particularly in the Balkans, where Serbian ambitions clashed with the Austro-Hungarian Empire, worsened by the Ottoman decline and the Balkan Wars of 1912-1913. Imperialism intensified competition as European powers vied for colonies, sparking friction, notably between Britain and Germany over naval supremacy. Militarism, evident in the arms race, glorified military solutions, while the alliance system—dividing Europe into the Triple Entente (France, Russia, Britain) and Triple Alliance (Germany, Austria-Hungary, Italy)—ensured that any conflict could spiral out of control. These factors created a powder keg ready to ignite.
The immediate spark came with the assassination of Archduke Franz Ferdinand on June 28, 1914, by Gavrilo Princip, a Serbian nationalist, setting off a chain reaction. Austria-Hungary’s harsh ultimatum to Serbia, followed by war on July 28, pulled in Russia, Serbia’s ally, prompting Germany to declare war on Russia and France by August 3. Germany’s invasion of neutral Belgium on August 4 drew Britain into the fray, honoring its treaty obligations. This rapid escalation turned a regional dispute into a global conflict, involving colonial territories in Africa and Asia, underscoring the war’s worldwide scope. As emphasized in the AP curriculum, these causes—nationalism, imperialism, militarism, alliances, and the assassination—illustrate how interconnected global politics and historical forces converged to unleash World War I.
World War I was characterized by total war strategies, where nations mobilized all available resources and populations, driven by significant technological advancements. Militarily, innovations such as machine guns led to trench warfare and massive casualties, with battles like the Somme resulting in over a million losses. Chemical weapons, including chlorine gas, caused devastating respiratory damage, while tanks and airplanes introduced early forms of armored and aerial combat. Submarines, particularly German U-boats, disrupted Allied shipping, significantly influencing the war’s trajectory. These technological developments, combined with industrial advancements like assembly lines for mass production, supported the war effort by engaging civilian industries and labor, including women, in unprecedented ways.
Governments also relied heavily on mobilization and propaganda to sustain public morale and support. Mass media, including posters like “I Want You for U.S. Army,” films such as The Battle of the Somme, and early radio broadcasts, played a crucial role in recruitment and maintaining civilian enthusiasm. Propaganda often depicted the enemy as barbaric, reinforcing nationalism and justifying the war’s brutality. These technological and innovative methods, from battlefield weaponry to home front media, highlight how World War I was conducted as a total war, with profound impacts on society and human interactions.
Between World War I and World War II, unresolved tensions emerged from the redistribution of territories and the persistence of imperial ambitions. After World War I, the Treaty of Versailles and the League of Nations mandates transferred former German colonies to Western powers like Great Britain and France, while Japan expanded its influence in East Asia by establishing entities such as Manchukuo and promoting the Greater East Asia Co-Prosperity Sphere. Despite the promise of eventual self-governance, these arrangements often continued colonial exploitation and reinforced imperial control.
At the same time, growing anti-imperial resistance challenged these colonial practices. Nationalist movements such as the Indian National Congress in India and various resistance efforts in West Africa pushed back against the continued domination by foreign powers, revealing deep discontent with the established order. These tensions between imperial ambitions and nationalist aspirations not only contributed to the instability that led to World War II but also laid the groundwork for future shifts in territorial holdings and state governance.
Questions over Ghandi Reading: 3/3 and 3/4
Read this article on Nationalist Movements in India and Vietnam in the Interwar Period . There will be a short quiz on this (Don't worry it is two pages long!)
What were the main reasons Indian nationalists argued for greater autonomy after World War I?
How did the Amritsar Massacre impact the relationship between Indian activists and British officials?
Describe the significance of the Government of India Act passed at the end of 1919. Why did it fail to gain support from Indian nationalists?
In what ways did Mohandas K. Gandhi's leadership influence the Indian nationalist movement?
What were the goals of the Salt March initiated by Gandhi in 1930, and how did it symbolize civil disobedience?
Explain the role of the Indian National Congress in the fight for independence. How did it attempt to address social issues within India?
How did the British government's policies regarding Muslim representation affect the independence movement in India?
What were the consequences of Ho Chi Minh's appeal for self-determination to Woodrow Wilson at the Paris Peace Conference?
Discuss Ho Chi Minh's transition from a young nationalist to a revolutionary leader. What influences shaped his political ideology?
What factors contributed to the outbreak of war between France and Vietnam after Ho Chi Minh declared independence?
The interwar economy (1918–1939) was marked by a decade of economic prosperity followed by a severe global downturn. The 1920s, particularly in the United States, saw rapid industrialization and consumer-driven growth, with an average annual GDP increase of around 4%. Technological advancements in automobiles, radio, and household appliances expanded markets, benefiting the middle and working classes. However, this prosperity was not universal; Germany faced hyperinflation in 1923 due to the financial strain of war reparations from the Treaty of Versailles, causing severe economic instability. Other parts of Europe recovered at varying rates, with Western Europe regaining pre-war income levels while Eastern Europe lagged due to the lingering effects of World War I and political unrest.
The boom of the 1920s ended abruptly with the Great Depression, triggered by the 1929 U.S. stock market crash. Between 1929 and 1933, U.S. GDP fell by approximately 27%, and unemployment soared to 25%. The depression had global repercussions, with international trade collapsing by over 50% and agricultural economies suffering as crop prices fell by around 60%. Latin American countries responded with import substitution and nationalization, such as Mexico’s creation of Pemex. Japan, heavily reliant on imported resources, faced economic hardship, while Germany’s economic struggles contributed to political extremism. The crisis led to protectionist policies, the abandonment of the gold standard, and the rise of Keynesian economics. The interwar economic fluctuations—marked by both industrial expansion and economic collapse—played a crucial role in shaping political and economic developments leading up to World War II.
Great Depression vs. the Five Year Plan:
Homework due 3/6 - 3/9: Due at beginning of class; do on paper and submit picture of assignment via MoeCampus
CLICK HERE FOR HW ANSWERS (POST after class)
SAMPLE LEQs to examine in class:
As a class we will look at LEQ 4A here: 6 point LEQ exemplar.pdf
Use the following to examine and grade which LEQ you have been given:
Reference guide and rubric information here: LEQ reference interwar econ.pdf (highlight parts and grade with partner)
The causes of World War II were shaped by both failed peace settlements and economic instability, which influenced how governments retained and exercised power. The Treaty of Versailles placed harsh reparations on Germany, creating resentment and economic hardship that weakened the Weimar Republic and fueled nationalist anger. At the same time, the Great Depression devastated economies worldwide, leading to mass unemployment and political instability. As democratic governments struggled to respond effectively, nations like Germany, Italy, and Japan pursued aggressive expansion to secure resources and restore national pride. Imperialist ambitions intensified, with Japan invading Manchuria in 1931 and later China in 1937, while Italy expanded into Ethiopia in 1935. Western democracies, preoccupied with economic recovery and maintaining order at home, followed a policy of appeasement rather than confronting these growing threats.
Internally, the rise of fascist and totalitarian regimes allowed leaders like Adolf Hitler, Benito Mussolini, and Emperor Hirohito to consolidate power through authoritarian policies and militarization. In Germany, Hitler's Nazi regime dismantled democratic institutions, used propaganda to control public opinion, and implemented aggressive policies like rearmament and territorial expansion, violating the Treaty of Versailles. Italy and Japan followed similar paths, using state-controlled economies and militaristic governance to strengthen their positions. These governments used fear, nationalism, and strict administrative control to suppress opposition and justify conquests. As Germany annexed Austria and the Sudetenland, and Japan continued its expansion in Asia, global tensions escalated.
World War II was a total war, requiring governments to mobilize all available resources through propaganda, nationalism, and strict state control. Western democracies like the United States and Great Britain used political speeches, art, and media to rally public support. Leaders such as Winston Churchill and Franklin Roosevelt framed the war as a fight for freedom and democracy, encouraging voluntary enlistment, war bond purchases, and increased industrial production. In contrast, totalitarian regimes like Nazi Germany and the Soviet Union relied on extreme state control. Adolf Hitler’s government used fascist ideology to promote racial superiority and justify military expansion, while Joseph Stalin’s USSR leveraged communist propaganda to unify citizens under a collective struggle against fascism. Both governments suppressed opposition, controlled information, and used forced labor to sustain their war economies.
New military technologies and tactics further defined the conduct of World War II, leading to unprecedented destruction and loss of life. The concept of total war meant that civilian populations were directly targeted, as seen in the firebombing of cities like Dresden and Tokyo and blitzkrieg, which aimed to weaken enemy morale and infrastructure. The atomic bomb, developed by the United States and used against Hiroshima and Nagasaki, demonstrated the devastating power of scientific advancements in warfare. These tactics, combined with mass mobilization efforts, blurred the lines between military and civilian life, increasing wartime casualties and reshaping how governments exercised control during and after the conflict.
In the 20th century, mass atrocities emerged as a devastating consequence of extremist ideologies that reshaped how societies organized and defined themselves. The rise of extremist groups in power—most notably the Nazi regime in Germany—led to systematic, state-sponsored campaigns aimed at the destruction of specific populations, as seen in the Holocaust. These actions were rooted in the ways societies grouped their members and established norms, which, when manipulated by hateful ideologies and bolstered by propaganda, paved the way for exclusion, dehumanization, and eventual genocide. This pattern of marginalization, where political, economic, and cultural institutions were co-opted to support extreme measures, illustrates how deeply social organization can impact state behavior.
Beyond the Holocaust, other mass atrocities throughout the 20th century further illustrate these dynamics. For example, during and after World War I, the Ottoman Empire carried out the genocide of Armenians, while in the late 1970s, extremist movements in Cambodia resulted in brutal mass killings. Similarly, in the 1990s, ethnic tensions culminated in the genocide of the Tutsi in Rwanda, and in the 1920s and 1930s, policies in the Soviet Union led to targeted violence against Ukrainians. These tragic events not only caused immeasurable human suffering but also left lasting impacts on political institutions and cultural identities, underscoring the critical need to understand and prevent the societal conditions that can lead to such extreme violence.
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