The Shot That Rang Throughout Europe - Connection Across Time

What I find most fascinating about World War I has nothing to do with the fighting, with alliances, or even with the faulty Treaty of Versailles. What I feel is the most unbelievable thing about World War I is the way it began: with one small, misguided bomb and two bullets from a single pistol. As if this doesn't seem insignificant enough to spark a global war, consider the fact that these were the doings of 5 college students, 3 of whom were too scared to do anything, and one of whom wasn't even intelligent enough to successfully commit suicide.
On one hand, this event could easily be named the single greatest event of the 20th century... which I'm certain it has before. Just imagine, the one fatal gunshot that killed Archduke Franz Ferdinand is what not only set off World War I, but is also the origin of just about every war since then. For example, World War II was a direct result of World War I and the Treaty of Versailles. Also, the wars that have taken place in the Middle East, (i.e. the Gulf War and the current War on Terror), are all results of the Treaty of Versailles, and the mess that it created. If not for the actions of those five college boys, Gavrilo Princip in particular, our world today would not be the same. Perhaps it would even be a better world.
On the other hand, I'm not entirely sure this event should ever be associated with the word "great". This assassination could be at best described as a complete and utter mess. All things considered, it really should not take more than one grown man to assassinate the Archduke and his wife, let alone five grown men. This was a poorly planned, and even more poorly executed assassination, and it was sheer luck that Princip was able to shoot Ferdinand and his wife. As if the fact that three of the men chickened out isn't enough of an insult to the assassination and all those associated with it, Cabrinovic's bombing attempt was atrocious, as was his failed suicide. If anyone should be given credit for the assassination of Archduke Franz Ferdinand and his wife, it should be the driver of their car, for taking the wrong route to the hospital.
However, whether the assassination is viewed as the most influential moment of the 20th century or as a lucky break matters not. All that matters is that this is the event that sparked the Great War, that this is the event that all other wars since then can be traced back to, and that this event is in more than one way both historic and fascinating.