The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.
The compromise of 1850 was a package of five separate bills passed by the united states congress in september 1850 which defused a four year political confrontation between slave and free states regarding the status of territories acquired during the mexican-american war
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 to see him 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.