Question

What were the long-term causes of the first world war?

Answer 1

1. NAtionalist tensions in Europe
2. Competition for European colonies
3 Arms races and militarianism
4. Formations of defense alliances

Immediate Causes (just in case you need to know):
1. Assassination of Franz Ferdinand
2. Austria-Hungary's retaliation against Serbia
3. Declarations of war between rival alliances.
4. Germany's invasion of Belgium.