Since His coming, we look back to His coming. This is the New Testament. Very simply, by the shedding of His Blood on the cross, Christ redeemed all men. We must explain two very important concepts. There is a great difference between redemption and salvation.
Redemption means the paying of the price.
Let us take a simple example. If ten men are in jail because they could not pay a hundred dollars fine, they remain there to the end of the sentence or have someone pay the fine. Let us say a redeemer gives the court a thousand dollars for the ten men. All have been redeemed. However, just two leave the jail, and other eight continue their jail sentence.