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Why Do We Live in Countries?
How did sovereignty become part of world history? In this educational video, learn why kingdoms turn into countries after the Thirty Years’ War.
How Did Humans Come to Live Longer and Healthier Lives?
From the history of vaccines and medical quarantines to the origin of the World Health Organization, explore how innovations in global health increased human longevity and prepared the world for COVID-19.
What Are the Causes and Consequences of Industrialization?
Learn about the Industrial Revolution and how technological innovations from the eighteenth and nineteenth centuries continue to shape society today.
What Is the Enlightenment and How Did It Transform Politics?
Explore how calls for liberty, equality, and individual rights caused revolutions around the world, from the American Revolution to the French and Haitian Revolutions.
What Is Colonialism and How Did It Arise?
Explore how colonialism enriched empires and fundamentally reshaped countries such as India.
Essential Events Before 1900
From the Silk Road and Christopher Columbus to the Ottoman Empire and the Revolutionary War, explore this history timeline covering major moments in global history before the twentieth century.
Why Did World War I Happen?
In this free resource on World War I, explore the causes and effects of the Great War to understand how the conflict shaped world history.
Why Did World War II Happen?
In this free resource on World War II, understand the causes of World War II and why these issues drove countries back to battle just two decades after World War I.
How Do Countries Decide Whether to Go to War?
Learn how balances and imbalances of power contributed to World Wars I and II in this historical video.
How Did the United States Become a Global Power?
Learn how domestic expansion and three wars—the Spanish-American War, World War I, and World War II—transformed the United States’ standing in the world.