Simply put, MacLaury's new book on color terminology systems in a hundred Mexican and Central American languages is a groundbreaking study on how the human mind apprehends the physical universe; it is by far the most important work on color nomenclature theory to appear in the past thirty years. M's insights, which are the culmination of some two decades of fieldwork and analysis, will be of tremendous value to linguists, anthropologists, psychologists, and cognitive scientists of many different backgrounds and interests.