The world ends when the strings of intertwining destinies are tied as knots. Steps that could have been molded into ladders are shunned as pathways for a future, thus we maybe going forward into the future but we're not going where we should be- up. The fate of the entire human civilization was, is and always has been known that one day we shall fall, but where? Until we begin to see higher priorities we shall continue our walk of death, dragging our own fleash and blood behind us, as their children will do so too, etc, etc.
This is nothing new, everybody develops these thoughts in time and it shows that we are human- curious creatures that decide to look further. But all murderers of human flesh should be envied- in the end, only they know the true value of a life. Curiosity killed the cat, they say.