Hi, world war first and second was two terrible events in the world history. And they bring many damages to the participant countries and thousands of people killed in first and second wars. Anyway we know that the war is not good and bring much damages for all participants regardless they become winner or failure in the war. So that no country now have tendency to fight with other one. But there are some causes of wars. May be studying of causes of first and second world war can help us in better understanding about war and might help us to prevent more war in the world. Let's watch the video about causes of first world war.