Jesus said to, "Go into all the world and proclaim the gospel to the whole creation" and "Go therefore and make disciples of all nations" (Mark 16:15-19: Matt 28:19).
1040 Window
The 10/40 Window is home to the majority of the world's poor. Of the poorest of the poor, more than eight out of ten live in the 10/40 Window. On average, they exist on less than a few hundred dollars per person per year. It has been said that "the poor are the lost, and the lost are the poor" as the majority of the un-reached live in the poorest countries of the world. There is a remarkable overlap between the poorest countries of the world and those that are least evangelized.[2]
If you have 40/10 vision you have super vision. God's vision is on the 10/40 window, so should ours. Despite its historical, religious, and geographical significance, an important reason for us to focus our vision here is that 1.6 billion people have never heard the Gospel. "And this gospel of the kingdom will be proclaimed throughout the whole world as a testimony to all nations, and then the end will come" (Matthew 24:14).