From Pope St. John Paul II’s Apostolic Exhortation Familiaris Consortio (1981):
“Since the Creator of all things has established the conjugal partnership as the beginning and basis of human society,” the family is “the first and vital cell of society.”105
The family has vital and organic links with society, since it is its foundation and nourishes it continually through its role of service to life: it is from the family that citizens come to birth and it is within the family that they find the first school of the social virtues that are the animating principle of the existence and development of society itself.
Thus, far from being closed in on itself, the family is by nature and vocation open to other families and to society, and undertakes its social role.
105 Second Vatican Council Apostolicam actuositatem, 11.
— Familiaris Consortio 42