Claim. The ideal family is not a married couple but three generations: grandparent, parent, and child — only this three-generation form completes the four-position-foundation and grounds the Kingdom on earth.
Elaboration. SMM rejects the dyadic family: “If there is only a husband and wife, there may be a today but there will be no tomorrow. If there is no tomorrow, all things come to an end” (3.4. Blessing is the key to perfection of the ideal family, 85-178, 1976.3.3). The four-position foundation is explicitly three-generational: “The four-position foundation as taught in the Divine Principle of the Unification Church refers to the realms of love of the three generations. The ideal of the creation of the universe can be realized only when three generations live with a harmonious and happy love within one house” (ibid, Blessed Family 947). The internal architecture is dense: parental love (vertical), conjugal love (horizontal), sibling love (front-back). At their center: “the place where two human beings marry and make love for the first time centering on God becomes the point of fruition and the center of all perfection” (ibid, 259-42, 1994.3.27). The family is therefore the smallest unit that can carry the full Kingdom shape.
See also. four-position-foundation, family