The murder of Archduke Franz Ferdinand of Austria-Hungary was the immediate cause of World War I, bringing the aforementioned factors into play.
More than four years and between 15 and 19 million people died during the First World War. Whether a combatant soldier or a civilian caught up in the mayhem of this terrible international battle, every death was a human being.
Three broad approaches have been used by historians to analyze the reasons behind the First World War. The first is precise, accurately identifying a particular event—the murder of Archduke Franz Ferdinand on June 28, 1914, in Sarajevo. The second extensively examines global trends that had been accumulating for many years in an effort to identify the deeper, underlying causes of the conflict. The third theory contends that due to poor handling of the situation brought on by Archduke Ferdinand's assassination, the world sort of stumbled into war, almost accidentally.
The war destroyed the world's economy and sparked widespread disease epidemics that resulted in millions more deaths.
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