Hierarchical, authoritarian institutions tend to be self-perpetuating, because growing up under their influence creates submissive/authoritarian personalities -- people who both "respect" authority (based on fear of punishment) and desire to exercise it themselves on subordinates. Individuals with such a character structure do not really want to dismantle hierarchies, because they are afraid of the responsibility entailed by genuine freedom. It seems "natural" and "right" to them that society's institutions, from the authoritarian factory to the patriarchal family, should be pyramidal, with an elite at the top giving orders while those below them merely obey. Thus we have the spectacle of so called "Libertarians" and "anarcho" capitalists bleating about "liberty" while at the same time advocating factory fascism and privatised states. In short, authoritarian civilisation reproduces itself with each generation because, through an intricate system of conditioning that permeates every aspect of society, it creates masses of people who support the status quo.
So basically the nuclear family, as the base unit of consensus society, with its attendant "oedipal miseries," a response to the "agricultural revolution" with its imposed scarcity and its imposed hierarchy has to be abolished? I've read some authors advocate the more primal and more radical model -- the band.
The typical hunter/gatherer nomadic or semi-nomadic band consists of about 50 people. Within larger tribal societies the band-structure is fulfilled by clans within the tribe, or by sodalities such as initiatic or secret societies, hunt or war societies, gender societies, "children's republics," and so on. If the nuclear family is produced by scarcity (and results in miserliness), the band is produced by abundance -- and results in prodigality. The family is closed, by genetics, by the male's possession of women and children, by the hierarchic totality of agricultural/industrial society. The band is open -- not to everyone, of course, but to the affinity group, the initiates sworn to a bond of love. The band is not part of a larger hierarchy, but rather part of a horizontal pattern of custom, extended kinship, contract and alliance, spiritual affinities, etc.
In fact in our society many forces are working -- largely invisibly -- to phase out the nuclear family and bring back the band. Breakdowns in the structure of Work resonate in the shattered "stability" of the unit-home and unit-family. One's "band" nowadays includes friends, ex-spouses and lovers, people met at different jobs and pow-wows, affinity groups, special interest networks, mail networks, etc. The nuclear family becomes more and more obviously a trap, a cultural sinkhole, a neurotic secret implosion of split atoms -- and the obvious counter-strategy emerges spontaneously in the almost unconscious rediscovery of the more archaic and yet more post-industrial possibility of the band.
The very fluidity and temporality of networks created proves to be one of the fortes, instead of a downside, of the arrangement indeed.