What do the themes of world history mean?

What was some causes of World War 1? What had the greatest effect on world war 1? What was the defining event of the 20th century? Edict of Nantes and what did it provide? What is the difference between colonial society of the 17th century and the 18th century? What is England's ethnic breakdown? What is true of the Canadian Shield region in North America? What country hosted the olympic games but no longer exists? What was the role of Kaiser Wilhelm the second in world War 1? What European country had a head start exploring and conquering the new world? How personal alliances in the workplan can be damaged by? How many years has it been since 9-11? What are 3 dialects spoken in China? What is the world's oldest currency still in use? Beginning in 1899 the Open Door policy increased trade between the US and which nation? What individual is given the credit for laying the foundation of the Russian Empire? The beginning and the end of world war 2? Which structure within a mission served as living quarters for Spanish immigrants? German inventor whose printing press helped to spread knowledge of the world? What does this mean to live a spartan life?