Since 1st-century Pentecost, Christ is the unseen Head of the Christian congregation no matter where on Earth.
Jesus' instruction found at Matthew 24:14; Acts of the Apostles 1:8 is carried out on an international scale just as Jesus wanted it done.
So, Jesus has been around in the heavenly realm of existence.
The passing of time has been needed for us to be born and think who we would like as sovereign over us.
The time is ' ripe', so to speak, for Jesus to take the action described at Isaiah 11:3-4; Revelation 19:14-15
The sword-like executional 'words' from Jesus' mouth will rid the Earth of the wicked.