Crash Course World History: War and Its Impact

John Green discusses the role of war in human history, exploring its impact on development, agriculture, and political leadership. He examines how war shaped city-states and empires, and how modern warfare and economics have shifted the focus from conquest to trade. The video highlights the benefits of peace and trade, suggesting that economic interdependence can reduce the frequency of wars.

What is one potential positive effect of war on human development discussed in the video?

• It always leads to peace.

• It reduces the need for political leadership.

• It can lead to the formation of human settlements.

• It eliminates the need for agriculture.

How did successful war leaders maintain their power in ancient times?

• By avoiding conflicts.

• By providing a constant flow of loot to their followers.

• By focusing on agriculture.

• By building large cities.

What role did civil militias play in city-states?

• They were ineffective in battles.

• They diminished the power of wealthy warrior elites.

• They were only used for ceremonial purposes.

• They were responsible for building city walls.

Why did empires often rely on mercenaries for their military needs?

• Mercenaries were known for their strategic skills.

• Mercenaries were more loyal than citizen-soldiers.

• Mercenaries were cheaper and easier to manage.

• Empires had no other choice.

What was one reason for the decline of empires in the modern era?

• Empires were expensive and unstable.

• Empires had no military power.

• Empires were too stable.

• Empires became too wealthy.

What was a significant change in warfare after 1500 CE?

• The rise of hunter-gatherer societies.

• The end of all wars.

• The introduction of gunpowder weapons.

• The decline of city-states.

How did the introduction of gunpowder weapons affect states?

• It led to the decline of trade.

• It eliminated the need for armies.

• It forced states to modernize their bureaucracies.

• It made states less powerful.

Why did trade become a better option than conquest for accumulating wealth?

• Trade was less risky and more profitable.

• Conquest was more popular.

• Conquest was easier.

• Trade was not possible.

What is one reason liberal democracies might avoid war?

• They are answerable to constituents who prefer peace.

• They have no military power.

• They are not answerable to constituents.

• They find war economically beneficial.

What did John Stewart Mill suggest about commerce and war?

• Commerce increases the need for war.

• Commerce makes war more likely.

• Commerce renders war obsolete.

• Commerce has no impact on war.