This book explains the deep influence of biological methods and theories on the practice of Americanist archaeology by exploring W. C. McKern's use of Linnaean taxonomy as the model for development of a pottery classification system. By the early 20th century, North American archaeologists had found evidence of a plethora of prehistoric cultures displaying disparate geographic and chronological distributions. But there were no standards or algorithms for specifying when a culture was distinct or identical to another in a nearby or distant region. Will Carleton McKern of the Milwaukee Public Museum addressed this fundamental problem of cultural classification beginning in 1929. He modeled his solutionknown as the Midwestern Taxonomic Methodon the Linnaean biological taxonomy because he wanted the ability to draw historical and cultural "relationships" among cultures. McKern was assisted during development of the method by Carl E. Guthe, Thorne Deuel, James B. Griffin, and William Ritchie. This book studies the 1930s correspondence between McKern and his contemporaries as they hashed out the method's nuances. It compares the several different versions of the method and examines the Linnaean biological taxonomy as it was understood and used at the time McKern adapted it to archaeological problems. Finally, this volume reveals how and why the method failed to provide the analytical solution envisioned by McKern and his colleagues and how it influenced the later development of Americanist archaeology.