Did Christ die for every human being of mankind ? No, His Death was limited to them He died and redeemed unto God. Heb 9:12,15
12 Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.
15 And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance.
Now those He died for and redeemed are they which are called, to receive the promise of eternal inheritance or eternal life.
In Gods economy of Salvation, His Kingdom, them who Christ died and redeemed shall be called Isa 43:1
But now thus saith the Lord that created thee, O Jacob, and he that formed thee, O Israel, Fear not: for I have redeemed thee, I have called thee by thy name; thou art mine.
Zech 10:8
I will hiss for them, and gather them; for I have redeemed them: and they shall increase as they have increased.
That word hiss means to whistle, pipe it denotes the call of them to be gathered
So the redeemed by the death of Christ, will be effectually called, and that by name, and gathered to their Shepherd !
So the death of Christ is limited to the redeemed, and then called and gathered ! 18