How did the death of archduke franz ferdinand urge on the collapse of peace in europe

It was a trigger that showed that there were two competing powers in Europe: Russia and Austria-Hungary (and their allies). 

Franz Ferdinand was killed by a Serbian separatist and the Austrians wanted him to be punished. On the other hand, Russia supported Serbia is saying that Austrian demands ( to be allowed to search for the culprit inside Serbia) were too much. 

This lead to a direct conflict between the two powers (Austria and Russia) and further lead to the war. 

Ithink it’s a : ) good luck on whatever

It taught people how to live a good life, but not what to believe.