Given a chance would you kill baby Hitler?

[abaris]

The black hand will survive, and it is their avowed goal to incite a general European war in the hopes that Austria will fall and a Serbian hegemony over the southern Slavs would emerge.   So the death of Príncip may alter the details of how the war between the entent and central powers will start in the bulkans within a few years of 1914, it will not Greatly lessen the possibility that a war between essentially the same entent and the same central powers will break out in the same bulkans within the same few years after the middle of 1914.

So go back to 1878. Prevent the treaty of Berlin. Or move your ass to 1908 and prevent Austria-Hungary from annecting Bosnia/Herzegowina. Or go to 1903. Prevent the Serbian king from being overthrown.

See what I mean?

What's the spark? What would prevent the load from going off?