Some factors to which the start of WW1 can be traced are:
1) the rise of nationalism in Europe, for example among the Serbians and Bosnians
2) building of big military alliances in Europe (this is what make the conflict into a world war
3) the direct cause was the assassination of the Austrian Crown Prince Franz Ferdinand
Very very good I think I'm sorry if I am wrong
It shifted away from Isolationism
A new language was born for them, they gave them new ways of comunication
