Altersklassen und Männerbünde, eine Darstellung der Grundformen der Gesellschaft; mit einer Verbreitungskarte
Heinrich Schurtz's 1902 German ethnological study, published in Berlin by Reimer, examines age classes and men's secret societies across human societies, with the scholarly aim of tracing basic social forms. Its two pictures are plain world distribution maps in pale tan and grey, with shaded patches marking where each social system occurs, mainly in Eurasia, Oceania, and the Americas, offering a designer a clean template for schematic regional maps.
