http://therationalmale.com/2015/10/30/complementarity/

The idea that a single mother is as co-effective as a father stems from the blank-slate belief that gender is a social construct rather than the physical and psychological manifestation of humans’ evolved mental firmware. While the foundations of this blank-slate theory originated with John Locke in in the 17th century it would be the anima/animus theories of Carl Jung to cement egalitarian equalism into the popular conscious with regard to gender relations.

Tabula Rasa (blank-slate) refers to the epistemological idea that individuals are born without built-in mental content and that therefore all knowledge comes from experience or perception. With the scientific and technical advancements of the 20th and 21st centuries we now have a better understanding of how the human brains of men and women operate from a far more advanced perspective than either Jung or Locke had knowledge of. To be fair, Jung’s presupposition was one that human’s possess innate potentials for both the masculine and feminine (thus the “get in touch with your feminine side” trope for men), but those potentials derive from a presumed-accepted egalitarian base.

Yet still, from a meta-social perspective, western(izing) culture still clings to the blank-slate theoretical models from Jung inspired by Locke and other tabula rasa thinkers of old.

Why is that? Why should it be that for all of our greater understanding of the biomechanics of the human body and it’s influences on behavior that the greater whole of society persists in the belief that men and women possess co-equal gender proficiencies based on an outdated, largely disproven Tabula Rasa model? I would argue that resisting the more obvious and practical model of evolved gender differences presents an uncomfortable proposition of biological determinism to people conditioned to believe gender is a nurture, not nature, proposition.