What are the shortcomings of the traditional theory of private international law

Private international law (private international law) in the world's civil law and commercial law in the case of mutual differences between countries, the civil law and commercial law containing foreign elements of the relationship, to solve the law of the country that should be applied. Because of the foreign factor is also known as the international factor, civil law and commercial law in the western tradition is called private law, private international law and thus the name.