The Next Big Challenge

I can't remember when the 10/40 window became the motivational metaphor of choice for the missions world. Perhaps the early 90's, like 15 years ago or so. It served well to focus the prayer and sending of laborers to those who because of religious background or political boundaries are most secluded from the gospel. It's also happens to be where most of the people in the world live since it includes India and lots of China. The numbers were always stunning as you looked at that window.
In the last few years, the conversation has shifted to the cities of the world. By 2050, 75% of the world's population will live in 100 cities. That will be roughly 6 billion people in 100 places, if I can do math at 7 am. Just think, most of the world will be stuck in traffic every day. I'm going to get some figures on where the majority of university students are right now and post them soon. I have this somewhere but haven't had enough coffee yet this morning to function at the "go find stuff" level. That usually takes me until about 10 am. More on this in days to come.