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Sex Biology:

It's Not Binary, and It's Not "Simple"

Despite what you may have heard, life is complex

The illusion (and meme) that sex biology is ‘simple’ (aka “binary”) has its roots in our ancient ancestors asking the basic questions:

"Who are we? How did we get here?? What does it all mean?"

When our distant ancestors were sitting around a fire, gazing up at the points of light in the sky (they didn’t know they were “stars”), and looking at each other’s bodies, the first (and for a very long time) only tool they had for answering those questions was through speculation and observational learning, also known as “social learning”. Primary gateways to social learning include:

  • Attention (an observer must pay attention to the model’s behavior and learn from it)
  • Retention (the information and behavior must be stored in memory for later use)
  • Motor Reproduction (the observer must have the physical ability to reproduce the behavior)
  • Motivation (the observer must be motivated to imitate the behavior)

Social Learning and "Sex Biology"

Estimated Timeline (80-120,000 BCE)

The capacity for human self-awareness (aka “consciousness”) came during the Paleolithic Age with the evolutionary enlargement of the parietal lobe in the brain. After this development, humans likely began looking for answers to things they could not readily explain. Later, with the development of language, members of human groups most likely shared their speculations about things they didn’t understand with others, and this (possibly) began the process of social learning through oral history. It is likely these speculating individuals rose to positions of leadership and authority as members of their group (and other groups):

  • Paid Attention to the speculation about the majority of body types observed
  • Maintained Retention of the oral speculations, over time converting them from speculation to ‘beliefs’ and/or ‘knowledge’
  • Reproduced the speculations/”beliefs”/”knowledge” into mythologies represented as ‘education’
  • Became increasingly Motivated to establish these speculations as ‘norms’, establishing structure and control to gain the power that comes with “knowledge” (no longer considered speculation), enforcing compliance with the “beliefs”/”knowledge” through repetition and authoritarianism
A female scientist uses a microscope in a laboratory, focusing intently on her research.
middle school gender

Mythology/Religion Speculates About Sex Biology

To understand the enormous damage this speculation/belief
turned "common knowledge" through religion has done, we must ask...

"Why does religion exist?" (according to Grok)

“Religion exists because it addresses fundamental human needs, uncertainties,
and social dynamics that have persisted across cultures and histor
y.”

Grok (developed by xAI), and majority owned by Elon Musk (denier of transgender identities,
including that of his daughter, Vivian) continues its response using 439 more words
without once declaring “Religion exists because there is a God”. 

Grok closes with this...

  • Once established, religions persist via indoctrination, institutions, and inertia, even as science explains more.
  • Evidence: 84% of the world population is religious (Pew, 2015; trends stable).

In short, religion isn’t an accident or delusion—it’s a multifaceted adaptation to human cognition, emotions, and society.

It persists because it works for these purposes, though secular alternatives (philosophy, science, humanism)
increasingly fill similar roles in modern contexts.

Memetic (“Meme”) theory (Dawkins, 1976) defines a meme as an element of culture that gets passed on by non-genetic means.

“Just as genes propagate themselves in the gene pool by leaping from body to body via sperm or eggs, so memes propagate themselves in the meme pool by leaping from brain to brain via a process which, in the broad sense, can be called imitation.”

In this sense, religion is nothing more than self-replicating, mythological speculation.
These rising secular explanations threaten patriarchal Christian Nationalist power structures.

Science Uses Evidence to Demystify Sex Biology

Science has proven that sex biology is not, and has never been binary, despite mythological speculation

  • MALE (variations exist within this classification)
  • FEMALE (variations exist within this classification)
  • INTERSEX (variations exist within this classification)

Intersex individuals—those for whom sexual development follows an atypical trajectory—are characterized by a diverse range of conditions, such as 5-alpha reductase deficiency (highlighted in graphic to the right). A small cross section of these conditions and the pathways they follow is shown here…The more we learn about sex and gender, the more these attributes appear to exist on a spectrum.”

-Amanda Montañez

Don’t allow this complex graphic representation of sex biology complexity intimidate you.
You don’t have to understand it (unless you want to!), in order to acknowledge that:

  • Human organic evolution embraces (and relies) on variations in human development

  • Religious belief may be of benefit to you and coexist with science, but it should never take functional precedence over the evidence of human diversity science provides

SCIENTIFIC AMERICAN

the complexity of sex
Credit: Pitch Interactive and Amanda Montañez