One of the curious things is how much teaching on the kingdom Jesus did and then replied that now was not the time to restore the kingdom of Israel. As we read Acts chapter 1 in light of the other Gospels, that really pops out. Big part of that is the Gospel is for the whole world, every nation, every ethnicity.
Ends of the Earth
Jesus tells the disciples to be witnesses to the ends of the Earth. What is remarkable about the church is how evenly spread it is throughout the world. Most religions have a specific geographical area that they are prevalent. The church is nearly even distributed on the continents. We have some work to do in Antarctica.
As Jesus showed up on Christmas day, he did so with saving mankind in view. God truly does love the whole world. But as Jesus saving us is prevalent in the Gospels, in Acts the push is Jesus sending people out to share that good news. Once saved we have a new and restored identity in Christ. Jesus went out to serve and save. We are called to do the same.
Where you are is your mission field. We need to be intentional in reaching and serving people. A huge part about that is how we pray specifically for those who need help and to be reached. God's desire is for a large family and he sends us out to make that happen. Jesus tarries because there is more people whom he wants saved.