Chapter 6: Modern America: 1900–2001

The twentieth century transformed the United States from a growing industrial nation into the most powerful country in the world — and tested it in ways no previous era had. In the span of a single century, the U.S. fought in two World Wars, endured the worst economic collapse in its history, faced down the Soviet Union in a decades-long Cold War, and watched its own citizens march in the streets demanding the equal rights promised to them since 1776. The century ended with the most devastating attack on American soil since Pearl Harbor. Understanding this century is essential for the civics test — and for understanding the country as it is today.

What This Chapter Covers

This chapter follows America through the major events of the twentieth century. The first body subchapter covers the period from World War I through World War II — including the Great Depression, the presidency of Franklin Roosevelt, and the attack on Pearl Harbor. The second covers the Cold War and the long standoff with the Soviet Union, the Civil Rights Movement and the landmark legislation it produced, and finally the September 11, 2001 terrorist attacks.

Why This History Matters for the Civics Test

More civics test questions draw from the twentieth century than from any other single period. The wars the United States fought in the 1900s, the Depression, the Cold War, key civil rights figures and legislation, and the September 11 attacks are all directly testable. This chapter brings them together in sequence so you can see how each event connects to the next.