The book is about the Gadaa System, a UNESCO inscribed heritage of humanity. The Gadaa System is an indigenous and democratic socio-political system of the Oromo nation of East Africa. It is "one of the most astonishing and instructive turns the evolution of human society has taken" and "one of the most complex systems of the social organization ever devised by the human imagination". Broadly speaking, Gadaa System is the zenith of integrated social, political, cultural, and spiritual thoughts, and the epitome of popular democracy, pure republicanism, and minimalist government. The book is written judiciously to satisfy the yearnings of readers who have waited for so long for such a comprehensive introductory book. For everyone who wants to learn about the Gadaa System, it is necessary to have the book. It contains all that they need to know about the UNESCO inscribed intangible cultural heritage of humanity.