If everyone did not die the earth would not contain all the generations. However in Christ there is a promise of an incorruptible body to the generations not just the present generation in Christ.
Salvation come from the north, the great void in the North is this where The Word was sent by his Father. akjv John 3:17
http://www.biblestudymanuals.net/heaven_in_the_north.htm
It says God sits on the great white throne and if he would but turn his face all things would be destroyed.
akjv John 1:10 He was in the world, and the world was made by him, and the world knew him not.