Early 20th century　Momentum grew for full-scale development of child welfare policies in many countries

As mentioned previously, while ideologically the idea of "children's rights" was born, in reality, due to the capitalistic development of society, children were often treated as objects of adult ownership, and child labor and child trafficking were rampant. In 1833, the "Factories Act" was passed in England, prohibiting child labor for children under the age of 9 and obliging parents to give their children educational opportunities, which provided a certain degree of protection. However, in the late 19th century, there were still cases of child abandonment and child murder, and many children were forced to work in factories and farms or were left to die in times of war or disaster.

Under these circumstances, movements for the well-being and welfare of children began to gain momentum, and the idea of "children's human rights" was born. Actually, in 1904, a child welfare system was developed in France, and in 1906, "the Children's Act" was passed in England. The law provides for the protection of vagrant children and status offender ( Children who have been found to be delinquent and are at risk of committing crimes ), as well as protective procedures for the prevention of child abuse. In the United States, the first White House Conference on Child Protection was held in 1909, and policies for the welfare and protection of children began to be adopted in Western countries.