Christ commanded the church (you) to go into the entire world and preach the gospel. Subsequently, he gave us the blue print on how to do it. First, you start from your local area (your Jerusalem) and move to distance lands. This is the core of who God is. He is a global God and as a result, we, his children, must have a global approach in our ministries.
Moreover, God intends for this to be done simultaneously as the apostles modeled for us. In the Acts, they wanted to stay put in Jerusalem and had to be scattered through persecution to other part of the world. Soon, the message left the confines of Jerusalem and was spread by the likes of Paul and others who witnessed the events of Pentecost. This message would very quickly reach Asia and Europe, preached by men and women across all works of life.
If the early apostles and the generations of European and American of the 17th and 18th centuries had stayed in their neighborhoods, and waited until every bit of need and was met, we would not have had the good news today. Our perspective as Christians must have two fronts: The Home and the International.