The Pope's view on family is not the only point of view:
Family and marriage are historical categories. phenomena which develop in accordance with the economic relations that exist at the given level of production. The form of marriage and of the family is thus determined by the economic system of the given epoch, and it changes as the economic base of society changes. The family. in the same way. as government, religion. science, morals. law and customs, is part of the. superstructure which derives from the economic system of society.
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The fact that with the consolidation of the capitalist system of production, the marital/family union develops from a production unit into a legal arrangement concerned only with consumption, leads inevitably to the weakening of marital/family ties. In the era of private property and the bourgeois-capitalist economic system, marriage and the family are grounded in (a) material and financial considerations, (b) economic dependence of the female sex on the family breadwinner – the husband – rather than the social collective, and (c) the need to care for the rising generation. Capitalism maintains a system of individual economies: the family has a role to play in performing economic tasks and functions within the national capitalist economy. Thus under capitalism the family does not merge with or dissolve into the national economy but continues to exist as an independent economic unit, concerned with production in the case of the peasant family and consumption in the case of the urban family. The individual economy which springs from private property is the basis of the bourgeois family.
Alexandra Kollontai
Theses on Communist Morality in the Sphere of Marital Relationshttp://www.marxists.org/archive/kollonta/1921/theses-morality.htm