37 This incontestable right of the family has at various times been recognized by nations anxious to respect the natural law in their civil enactments. Thus, to give one recent example, the Supreme Court of the United States of America, in a decision on an important controversy, declared that it is not in the competence of the State to fix any uniform standard of education by forcing children to receive instruction exclusively in public schools, and it bases its decision on the natural law: the child is not the mere creature of the State; those who nurture him and direct his destiny have the right coupled with the high duty, to educate him and prepare him for the fulfillment of his obligations.
Source: Divini Illius Magistri (Vatican.va)