When we were doing a World War One unit in school, we had to do a drawing (for homework) showing all four causes of the war. Those were :

- Militarism (Shown by Sasuke and Itachi)
- Alliances (Shown by Naruto and Sasuke)
- Imperialism (Shown by Raito/Light)
- Nationalism (Shown by Sasuke and Itachi)

I took a picture of it with my camera, then resized and cut it out with Paint Shop Pro.