Good question.
It means that God's intention is to redeem all of humankind, not just a select few in the here and now.
Error number one. Redemption is not for a select few in the here and now. The redeemed go all the way back to Abel.
The offer is open to everyone, but it is not without conditions. Just as life itself was not without conditions at the start in Eden. If the humans wanted to keep living, they had to obey only one simple command ....obedience is at the core of the whole issue....so why would it not also apply down to our day? God does not change.
The gift is there for all who accept the terms. The wicked have nowhere to hide their disobedience, which will be clearly seen in their own attitudes and actions. God is under no obligation to save those who want to disobey him. We have seen where disobedience has taken us.
There will be an age of restoration when all nations and leaders (both political and religious) and all individuals
will be evaluated/corrected/restored and redeemed. Healing will come to the nations.
We seem a glimpse of that in this scripture. Notice everywhere this takes place.
Philippians 2:10-11
that at the name of Jesus every knee should bow,
in heaven and on earth and under the earth,
11 and every tongue acknowledge that Jesus Christ is Lord,
to the glory of God the Father.
Yes, you have sort of answered your own question..... Christians are found in all nations today, so “at the name of Jesus” (the only one who could pay the price of redemption), every knee will bow in respect to his selfless and willing sacrifice. But they have to be recognized by God as disciples of his son and they will obey his commands willingly, not grudgingly....not questioning their validity as satan did to the woman.
Who “in heaven” will bow to that name if not those chosen to rule with him in his Kingdom? (Rev 20:6)
They are chosen from among mankind as “firstfruits”....(Rev 14:1-5) these will rule in the kingdom with Jesus.....but another group would follow....their subjects on earth, which will include all the dead (good and bad) whom Christ resurrects once he has established his Kingdom over the earth, (John 5:28-29) most of whom died in ignorance.
Those who are “under the earth” will return to life in the resurrection and enjoy the restoration of God’s first purpose for this earth and the human race he placed here.
All that Jesus did was
“to the glory of God the Father”...the God that he himself worshipped (Rev 3:14) and whose interest he served, and in whose name he came preaching about salvation to those who accept his truth.
“The god of this world” has the majority under his control right now, (2 Cor 4:3-4) so when the judgment comes on this world, in this “time of the end”.......all who are alive will be separated into one camp or the other.....”sheep or goats”....”wheat or weeds”...by our own choices we will place ourselves in one of those camps. There is no neutral space and it’s decision time. There are no second chances here, because we have had ample time to make our choices. “Like the days of Noah”.....this is a judgment period. (Matt 24:37-39)