This book is exploring and to finds out whether federalism can be a good system of government for South Sudan to address constant tribal, regional conflicts and turmoil since federalism is more suitable in practice for societies with complexity of diversities via, ethnic, linguistic, cultural, racial, religious and other cleavages which are territorial defined. However, the nature of diversities helps a nation articulate decision to adopt the aggregate or dis-aggregative type of federalism. South Sudan then falls into the latter because of the wide diversities which cannot be controlled by unitary government but rather by a federal system which was the focus of this book.