The Tenth Parallel

The tenth parallel—the line of latitude seven hundred miles north of the equator—is a geographical and ideological front line where Christianity and Islam collide. More than half of the world's 1.3 billion Muslims live along the tenth parallel; so do sixty percent of the world's 2 billion Christians. Here, in the buzzing megacities and swarming jungles of Africa and Asia, is where the two religions meet; their encounter is shaping the future of each faith, and of whole societies as well.