How did the assassination of Archduke Franz Ferdinand lead to the unexpected unraveling of century-old European alliances?

The assassination of Archduke Franz Ferdinand of Austria on June 28, 1914, is often cited as the spark that ignited World War I. However, this event did not occur in a vacuum but against a backdrop of intricate alliances and growing tensions in Europe. Over the 19th century, European powers had formed a complex network of alliances intended to maintain a balance of power and prevent any one nation from becoming too dominant. These alliances, initially seen as diplomatic strategies for peace, turned into a web of commitments that forced countries into war. With Ferdinand's death, tensions quickly escalated, and alliances that were decades in the making began to unravel, pulling nations into a catastrophic conflict. Understanding how this single event could unravel the diplomatic fabric of Europe offers insight into the fragility of peace and the domino effect of international politics.