How did world war 1 begin

The assassination of Archduke Franz Ferdinand in Sarajevo on 28th June 1914, it triggered a chain of events that resulted in World War 1. After the assassination, Austria-Hungary threatened war on Serbia. ... Germany sided by Austria-Hungary, while Russia sided with the Serbians.

Explanation:

The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. ... Thus began the expansion of the war to include all those involved in the mutual defense alliances.

hope that helps!

i believe it is capitalists.  

i would say that the politicial parties from state to state varies.