p. 20: The emergence of the modern nation-state destroyed the legal unity provided by the common acceptance of the Roman-canonic ius communein feudal Europe. The ius commune, associated in many minds with the concept of the Holy Roman Empire, was a law that transcended the diversities of local tribes, communities, and nations.
Law: Sources of Law pp. 19-25
Codification pp. 26-33; 48-55
Role of codification in civil law; in common
Procedure pp. 34-38; 80-89; 111-132
Role of the Jurists pp. 61-67; 101-110