Population and the coming of Emmanuel.

I was thinking about when Christ came to this earth.  We tend to think today that the earth was as populated as it is now but it wasn't.  Doesn't it make sense that Christ would come into our world after the history of Israel had had enough time to show itself and show its failings and God's working with it but wouldn't Christ come before the greatest population growth since His work was going beyond Israel and into the whole world.  Why?  so that his important work would grow as the populations grow. The gospel was spread by a small number of people, His disciples, into a small world and grew as the world grew. The beginning of earth was the beginning of God's relationship with people and for that time was setting up that world for Christ to come at the right time to correct the chaos we had gotten ourselves into and create a history of His Story.