Wikipedia
Familialism or familism is an ideology that puts priority to family. The term familialism has been specifically used for advocating a welfare system wherein it is presumed that families will take responsibility for the care of its members rather than leaving that responsibility to the government. The term familism relates more to family values. This can manifest as prioritizing the needs of the family higher than that of individuals. Yet, the two terms are often used interchangeably.
In the Western world, familialism views the nuclear family of one father, one mother, and their child or children as the central and primary social unit of human ordering and the principal unit of a functioning society and civilization. Accordingly, this unit is also the basis of a multi-generational extended family, which is embedded in socially as well as genetically inter-related communities, nations, etc., and ultimately in the whole human family past, present and future. As such, Western familialism usually opposes other social forms and models that are chosen as alternatives (i.e. single-parent, LGBT parenting, etc.).
In Asia, aged parents living with the family is often viewed as traditional. It is suggested that Asian familialism became more fixed after encounters with Europeans following the Age of Discovery. In Japan, drafts based on French laws were rejected after criticism from people like by the reason that "civil law will destroy filial piety".
Regarding familism as a fertility factor, there is limited support among Hispanics of an increased number of children with increased familism in the sense of prioritizing the needs of the family higher than that of individuals. On the other hand, the fertility impact is unknown in regard to systems where the majority of the economic and caring responsibilities rest on the family (such as in Southern Europe), as opposed to defamilialized systems where welfare and caring responsibilities are largely supported by the state (such as Nordic countries).