God will come like a thief in the night not even Jesus his son knows when it will end, supposedly the world will end when the message of God/Christ is spread all across the earth making it fair for all those to choose either to be a follower of chrism or not.....idk for sure i'm not a very religious person but i remember my pastor telling us this when i was younger, it does make sense if god is a just god he will make it fair and won't come until all know of him even if they decide not to believe or not follow him