"On June 28, 1914, Franz Ferdinand, Archduke of Austria and heir to the Austro-Hungarian throne, was assassinated in Sarajevo by Gavrilo Princip, a Bosnian Serb student. He was part of a group of fifteen assassins, acting with support from the Black Hand, a secret society founded by pan-Serbian nationalists, with links to the Serbian military. The assassination sparked little initial concern in Europe. The Archduke himself was not popular, least of all in the Austro-Hungarian Empire. While there were riots in Sarajevo following the Archduke's death, these were largely aimed at the Serbian minority. Though this assassination has been linked as the direct trigger for World War I, the war's real origins lie further back, in the complex web of alliances and counterbalances that developed between the various European powers after the defeat of France and formation of the German state under the leadership of Otto von Bismarck in 1871.
Reasons & Responsibilities
The reasons for the outbreak of World War I are a complicated issue; there are many factors which intertwine. Some examples are:
Fervent and uncompromising nationalism
Unresolved previous disputes
The intricate system of alliances
Convoluted and fragmented governance
Delays and misunderstandings in diplomatic communications
The arms races of the previous decades.
Rigidity in military planning
There are many different hypotheses that try to explain who, or what, is to blame for the outbreak of the First World War. Early explanations, prominent in the 1920s and 1930s, stressed the official version of responsibility as described in the Treaty of Versailles and Treaty of Trianon, that Germany and its allies were solely responsible for the war. However, as time progressed, scholars began looking toward the rigidity of both German and Russian military planning, each of which stressed the importance of striking first and executing plans quickly.
The fact that for many decades the British had been accustomed to colonial wars which were won relatively easily against much weaker adversaries certainly helped build enthusiasm for the Great war. In addition, the fact that no major political force opposed the war meant that those who did not agree with it had little organisational power to build opposition, though small protests continued throughout the war.
Another cause of the war was the building of alliances and arms races. An example of the latter is the launch of HMS Dreadnought, a revolutionary battleship that rendered all previous ships obsolete as "pre-dreadnoughts", in 1906. This weakened Britain's power as a seafaring nation and sparked a major naval arms race in shipbuilding, particularly between Britain and Germany due to new imperialism. Overall, nations in the Triple Entente became fearful of the Triple Alliance and vice versa.
The civilian leaders of the European powers also found themselves facing a wave of nationalist zeal that had been building across Europe for years. This left governments with ever fewer options and little room to manoeuvre as the last weeks of July 1914 slipped away. Frantic diplomatic efforts to mediate the Austrian-Serbian quarrel simply became irrelevant, as the automatic military escalations between Germany and Russia reinforced one another.
Furthermore, the problem of communications in 1914 should not be underestimated; all nations still used telegraphy and ambassadors as the main form of communication, resulting in delays from hours to even days.
There is probably no single concise or conclusive assessment of the exact cause of the First World War."