2. A branch of the law which embraces the theory of the different classes of men who exist in a state which has been formed by nature or by society; it includes particularly the theory of the ties of families, and the legal form and juridical effects of the relations subsisting between them. The Danes, the English, and the learned in this country, class under this head the relations which exist between men in a political point of view. Blackstone, among others, has adopted this classification. There seems a confusion of ideas when such matters are placed under this head. Vide Bl. Com. Book 1.