It is good to be reminded that books of this sort are cyclical in character, spiralling up towards an ever-more comprehensively exacting summit which brings to a centro-complexifying head things that, in the very nature of such matters, it were only possible to introduce in more general terms earlier on or, rather, lower down the work's inner structure. In that respect, what John O'Loughlin has achieved here with regards to the interaction and interrelativity of psychological and physiological factors on either a female or a male basis, depending on the elemental context, surpasses, by far, whatever had been achieved before, and not only by himself For this final working-out, in some detail, of such psychological and physiological dualities puts everything in perspective, and it only remains for those who are capable of reading and appreciating this work to confirm him in the correctness of his vision and the accuracy of his approach to truth.