I think the point of Jesus showing self-sacrificing love for others is to ' get on with doing it ourselves...'I'm all in favor of global peace, equality of opportunity, many good and important things, but I think we'd better get on with doing it ourselves instead of waiting for a guy who's already running two thousand years late.
It was ' get on with doing it ourselves...' when Jesus taught about the neighborly good Samaritan - Luke 10:30-37
Notice to show mercy and we are to do likewise.
Even if everyone on Earth obeyed the Golden Rule there would be the ' get on with doing it ourselves...'
Plus, when a person hears the good news about God's kingdom of Daniel 2:44 through Matthew 24:14; Acts 1:8
then, if a person does listen and obey the good news they will cultivate the fruit of God's spirit at Galatians 5:22-23
So, the people who do respond will ' get on with doing it oneself ...'
Since God gifted earth to us (Psalms 115:16) then we are responsible to be earth's caretakers - Genesis 1:28
Because most mankind won't apply the Golden Rule is why God is going to have Jesus step in to come to our rescue.
Just think if Jesus' 1,000-year day started 2,000 years ago we would never have been born.
The time frame has allowed for us to be born and think who we would like as Sovereign over us.
The time frame has also allowed all in heaven and on earth to see man can't successfully govern himself.