Where are people enslaved?
Millions are enslaved right in the 10/40 window. In many cultures slavery is culturally accepted. Where slavery is illegal the victims are sucked into trafficking; sold across borders, or locked in hidden rooms by their captors to defy the law. And, yes, the western world is not devoid of this criminal behavior. While we are educated against it, and have every possible resource to counter it, the much richer west is often the purchaser.