Bear a third world war?

according to my opinion:
World War was a historical decline of man
the second was the largest of all the horrors that humanity has suffered, a disrespect for all laws of life's greatest tragedy in history
the second surpassed in barbarity, in rivers of blood, deaths, torture, throughout the first worth mentioning that the first retained its military character so to speak while in the second this barrier will be relayed to the lives of millions of innocent civilians

If a third world war humanity came bear or be the end?