More so than any other book I can recall, this really got at the concept of there being multiple systems of medicines and afflictions in the world: Western science-based ones vs. indigenous folk and belief-based ones. A Luo family migrates from their ancestral land to “open” land near a displaced and resentful Zangazi tribesman in Tanganyika, creating the tension in this heartbreaking story. Immigration is not a new problem, obviously.