4. Key Themes in U.S. History

You don't need to memorize every date, but you should know the big turning points and what they changed.

• Colonization & Independence (1600s–1776): thirteen British colonies grew, then declared independence in the Declaration of Independence (1776), arguing that government must protect rights and rests on the consent of the governed.
• A New Nation (1780s): after winning the Revolution, the states wrote the Constitution to build a stronger national government.
• Civil War & Reconstruction (1861–1877): disputes over slavery and states' rights split the country. The Union won, slavery ended, and new amendments expanded rights.
• Industrialization & Immigration (late 1800s): factories, railroads, and waves of immigrants transformed the economy and cities.
• Civil Rights Movement (1950s–1960s): Americans organized to end legal segregation and win equal rights, leading to laws like the Civil Rights Act of 1964.

A repeating theme: the meaning of 'liberty and equality' has expanded over time to include more and more people.

⚠️ Common misconception: the Declaration of Independence (1776) and the Constitution (1787) are different documents written years apart — don't mix them up.

💡 Tip: for each era, remember the cause and the effect. The GED® loves cause-and-effect questions.