What were the causes of the First World War

Mostly the assassination of Franz Ferdinand!

There is no exact cause for WW1, but the main factors leading towards it were - >

the Over) 40 yr dispute between the great powers of Europe (Britain, France, Italy, Austro-Hungary, Russia, & Germany)

general growth of a nationalistic way of thinking & gorverning all acroos Europe,

and the july crisis of 1914, when Franz Fernindand was killed along with his wife and a few agents