From Pope St. John Paul II’s Apostolic Exhortation Familiaris Consortio (1981):
The social role of the family certainly cannot stop short at procreation and education, even if this constitutes its primary and irreplaceable form of expression.
Families therefore, either singly or in association, can and should devote themselves to manifold social service activities, especially in favor of the poor, or at any rate for the benefit of all people and situations that cannot be reached by the public authorities’ welfare organization.
The social contribution of the family has an original character of its own, one that should be given greater recognition and more decisive encouragement, especially as the children grow up, and actually involving all its members as much as possible.107
In particular, note must be taken of the ever greater importance in our society of hospitality in all its forms, from opening the door of one’s home and still more of one’s heart to the pleas of one’s brothers and sisters, to concrete efforts to ensure that every family has its own home, as the natural environment that preserves it and makes it grow. In a special way the Christian family is called upon to listen to the Apostle’s recommendation: “Practice hospitality,”108 and therefore, imitating Christ’s example and sharing in His love, to welcome the brother or sister in need: “Whoever gives to one of these little ones even a cup of cold water because he is a disciple, truly, I say to you, he shall not lose his reward.”109
The social role of families is called upon to find expression also in the form of political intervention: families should be the first to take steps to see that the laws and institutions of the State not only do not offend but support and positively defend the rights and duties of the family. Along these lines, families should grow in awareness of being “protagonists” of what is known as “family politics” and assume responsibility for transforming society; otherwise families will be the first victims of the evils that they have done no more than note with indifference. The Second Vatican Council’s appeal to go beyond an individualistic ethic therefore also holds good for the family as such.”110
107 Apostolicam actuositatem, 11.
108 Rom 12:13.
109 Mt 10:42.
110 Pastoral Constitution on the Church in the Modern World Gaudium et spes, 30.
— Familiaris Consortio 44