Welcome to Unit 7: The Modern Age Begins (1890–1945)!

Welcome, everyone! Unit 7 is arguably the most action-packed period in American history. Think of this era as the time when America "grew up" and became a global superpower. We’ll cover how the U.S. moved from a country focusing on its own borders to a leader on the world stage. We will explore the Roaring Twenties, the Great Depression, and two massive World Wars. Don't worry if this seems like a lot of information—we’re going to break it down into easy, bite-sized pieces!

7.1 & 7.2: Imperialism: The Push for an Empire

After the frontier was "closed" in 1890, many Americans started looking overseas. This is called Imperialism—when a stronger country extends its influence over a weaker one. Why did the U.S. do this? Think of the acronym "E.M.P.I.R.E.":

  • Economic: New markets to sell American goods.
  • Military: Building a strong navy (thanks to Alfred Thayer Mahan).
  • Political: Competing with European powers.
  • Ideological: "Social Darwinism" and the (flawed) idea that Americans were superior.
  • Religious: Spreading Christianity.
  • Expansion: Looking for a new "frontier."

The Spanish-American War (1898)

The U.S. fought Spain to "free" Cuba, but we ended up gaining our own territories like Guam, Puerto Rico, and the Philippines. This war was fueled by Yellow Journalism—sensationalized, over-the-top news stories designed to make readers angry and sell papers.

Quick Review: The Imperialism Debate

Not everyone liked this! The Anti-Imperialist League argued that taking over other countries went against American values of liberty and self-government. They thought it was hypocritical to be a democracy while ruling others without their consent.

Key Takeaway: By 1900, the U.S. was no longer just a North American nation; it was an international empire.

7.3 & 7.4: The Progressive Era (1890–1920)

The Gilded Age (Unit 6) left the U.S. with a lot of problems: dirty cities, corrupt politicians, and dangerous factories. The Progressive Era was like a "national cleanup." Progressives were usually middle-class reformers who wanted the government to fix these issues.

Who were the Reformers?

  • Muckrakers: Journalists who "raked up the muck" (dirt) of society. For example, Upton Sinclair’s book The Jungle exposed the gross conditions in the meatpacking industry.
  • Settlement Houses: People like Jane Addams created places (like Hull House) to help poor immigrants find jobs and learn English.
  • Suffragists: Women fighting for the right to vote (the 19th Amendment).

The "Progressive Amendments" (Memory Aid: 16, 17, 18, 19)

1. 16th: Graduated Income Tax (the more you make, the more you pay).
2. 17th: Direct election of Senators (gives power to the people).
3. 18th: Prohibition (banning alcohol—think 18 is the age you couldn't drink).
4. 19th: Women’s Suffrage (Right to vote!).

Did you know?

President Theodore Roosevelt was a "Trustbuster." He used the Sherman Antitrust Act to break up big monopolies that he felt were hurting the public. He called his plan the "Square Deal."

7.5 & 7.6: World War I and the Homefront

World War I started in Europe in 1914. At first, the U.S. wanted to stay Neutral (staying out of other people's business). However, we joined in 1917 because of Unrestricted Submarine Warfare (Germany sinking American ships) and the Zimmermann Telegram (Germany asking Mexico to attack the U.S.).

Life at Home During the War

  • The Great Migration: Thousands of African Americans moved from the rural South to the industrial North to find factory jobs and escape Jim Crow laws.
  • Civil Liberties: During the war, the government passed the Espionage and Sedition Acts, making it illegal to speak out against the war. This shows that in times of war, personal rights are often limited.

The Peace Plan

President Woodrow Wilson wanted "peace without victory." He proposed the Fourteen Points, which included a League of Nations to prevent future wars. However, the U.S. Senate refused to join the League because they feared it would pull America into future European conflicts.

Common Mistake: Many students think the U.S. joined the League of Nations. Wrong! Even though it was our President’s idea, the U.S. returned to Isolationism instead.

7.7 & 7.8: The Roaring Twenties

The 1920s was a decade of conflict between "Old" and "New" values. It was a time of Consumerism—people buying cars (Ford’s Model T), radios, and refrigerators on credit (buy now, pay later).

Key Conflicts of the 20s:

  • The Red Scare: A fear that communists (radicals) were going to take over the U.S. after the Russian Revolution.
  • Fundamentalism vs. Modernism: The Scopes "Monkey" Trial was a legal battle over whether evolution should be taught in schools.
  • The Harlem Renaissance: A celebration of African American culture, music (Jazz!), and literature in NYC. Key figure: Langston Hughes.
  • Immigration: The U.S. passed Quota Acts to strictly limit the number of immigrants coming from Southern and Eastern Europe.

7.9 & 7.10: The Great Depression and the New Deal

The party ended in 1929 with the Stock Market Crash. The Great Depression was caused by overproduction, bank failures, and too much debt. At its worst, 25% of Americans were unemployed.

FDR and the New Deal

President Franklin D. Roosevelt (FDR) promised a New Deal. He used the government to provide the "3 Rs":

  • Relief: Immediate help for the poor and unemployed (e.g., the CCC).
  • Recovery: Programs to get the economy moving again (e.g., the AAA for farmers).
  • Reform: Permanent changes to prevent another crash (e.g., Social Security and the FDIC which protects your bank money).
Analogy: The New Deal

Think of the U.S. economy like a broken car. Relief is giving the driver a ride; Recovery is fixing the engine; and Reform is installing a better GPS and safety features so the car doesn't crash again.

Quick Review: The New Deal didn't fully end the Depression (WWII did that), but it fundamentally changed the U.S. by making the government responsible for the people's economic well-being.

7.11 - 7.14: World War II

Just like WWI, the U.S. tried to stay neutral at first. However, we became the "Arsenal of Democracy," sending weapons to our allies (like Great Britain) through the Lend-Lease Act. We officially joined after the Japanese attack on Pearl Harbor on December 7, 1941.

The War Effort

  • Mobilization: Everyone helped. Women worked in factories (Rosie the Riveter), and the War Production Board turned car factories into tank factories.
  • Japanese Internment: In a tragic move, the U.S. government forced Japanese-Americans into relocation camps (Executive Order 9066). The Supreme Court upheld this in Korematsu v. United States, saying it was a "military necessity."
  • The Atomic Bomb: The secret Manhattan Project developed the atomic bomb, which was dropped on Hiroshima and Nagasaki to end the war quickly.

Post-War Results

Unlike WWI, the U.S. did not return to isolationism after WWII. We joined the United Nations and became one of the two global "superpowers" (alongside the Soviet Union), leading us directly into the Cold War.

Final Key Takeaway: By 1945, the United States was the wealthiest and most powerful nation on Earth, and the era of isolationism was officially over.

Don't worry if you find the timeline of the New Deal or the specific battles of WWII confusing. Focus on the BIG SHIFTS: Why did we move from isolation to world power? How did the government’s role in the economy change? You've got this!