This book is about the Gadaa System, an indigenous democratic socio-political system of the Oromo nation of East Africa. It 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 Gadaa System, it is necessary to have. It contains all that they need to know about the Gadaa System, a UNESCO inscribed intangible cultural heritage of humanity.