The objective and scope of the Book is to propose feasible administrative state boundaries in order to alleviate the current ethnic based political and boundary conflicts between various regional states and ethno-linguistic groups in Ethiopia due to demarcation of state boundaries based on language and ethnicity. The proposed administrative boundaries in this book are based on review of historical and legal basis of governance system, and Integrated River Basin Management in Ethiopia with a focus on bringing up non-ethnic based criteria for demarcating administrative boundaries that would result in unity and prosperity in the country, and regional economic integration in Africa.