Claim. Had Adam and Eve not fallen, God would have dwelt within them as the vertical Parent, they would have become substantial parents, and the resulting royal three-generation family would have founded the heavenly kingdom directly.
Elaboration. SMM gives the unfallen counter-history with structural specificity: “Firstly, God created Adam and Eve in order to assume physical form, and secondly, in order to fulfill love. When Adam and Eve reach perfection and become the substance of love in which the two can be one, God can dwell in them and become the Parent of perfect love for humankind. Then, Adam and Eve become the substantial parents in the image of God, and multiply substantial children, thus creating the ideal world” (1.2. If the Fall had not occurred…, Blessing-307). The royal-family structure has three generations: “Adam was the firstborn son, the True Father and the king… Who was the grandfather in Adam’s family? God was the grandfather. The father and mother were Adam and Eve” (ibid, 218-255, 1991.8.19). The Fall, then, did not just damage individuals — “The Fall of Adam and Eve was not just their Fall; it signified the Fall of all human history” (ibid, 38-149, 1971.1.3) — but aborted a substantial parental structure.
See also. purpose-of-creation, true-parents, fall