So social law greatly expanded the ideals of civil law while also modifying some of them. The most representative examples are restrictions on the exercise of ownership, modification of the principle of freedom of contract, and the principle of no-fault liability. Unlike in civil law, the exercise of ownership came to be restricted by the standard of public welfare, and the principle of freedom of contract came to be limited as state intervention was allowed. In addition, the principle of no-fault liability means that damages can be paid without examining whose fault caused the harm. This is a law that modified the civil-law principle of fault liability.

Therefore, social law is sometimes called the most modern form of law, having modified and supplemented the content and principles of civil law. Such social law is not only included in the French Civil Code of 1804 but is also closely related to social welfare law.

Seen this way, social law can be said to be the supplementation and modification of civil law. Still, the concept of social law cannot be recognized merely because it criticized and modified the principles of civil law, because, just as much as the modification from civil law to social law, the social environment and historical background changed as society changed. With these changes over time, the content and meaning of labor law and economic law changed, and attitudes toward recognizing the concept of social law came to differ from state to state and society to society.

Social welfare law has its own independent legal system that is neither public law nor private law. Therefore, the fact that its legal background is drawing attention as a new administrative field is also related to the background of social welfare law. The new emergence of legal movements in the modern sense also plays a part.

There are also parts to correct as you read. The French Civil Code of 1804 (the Napoleonic Code) is not social law but the representative code of modern civil law, embodying absolute ownership and freedom of contract, and the rule of law is a concept distinct from the separation of legislative, judicial and executive powers. Correcting and understanding these two points accurately makes the contrast between civil law and social law sharper, and it becomes a solid starting point when studying individual statutes such as the Framework Act on Social Security and the Social Welfare Services Act, so it works well as the introduction to a social welfare legislation assignment. Read it together with the relevant unit of your textbook.