Why will God raise (revive) the entire mankind after death on the Day of Judgement (Hereafter)?

Verses 38-40 of Chapter 16:

They solemnly swear by God with their most sacred oaths that "Allah will never raise him who once is dead". Why will He not raise? It is a promise He has made binding on Himself, but most people do not know it. And It must be fulfilled so that He may reveal to them that thing about which they are differing, and that the disbelievers might know that they were liars. (As regards its possibility.) when We desire to bring a thing into existence, We need only say, "Be", and it is there.