06/10/2025
Jnana
Since reading 'Eve' by Cat Bohannon, I've been contemplating the evolutionary nature and purpose of 'The Change' that almost all women experience at some time in our lives. Then assimilating insights with my research into and lived experiences of higher sensitivity.
My first (summary) hypothesis - The Night Watch Women is as follows:
Fluctuations in the key female hormones of oestrogen and progesterone interact with and affect melatonin, which governs day/night wakefullness, relating to photo-sensitivity (light spectrum sensitivity), as well as linking to moods.
There is a clinically recognised link between more night time wakefulness and insomnia around the time of progesterone surges - with PMS and in permenopausal women.
There must have been some evolutionary benefit for more women to be more wakeful and alert at night, at certain times of the month, and at a certain age threshold (coinciding with declining fertility)?
Given the dangers present in our ancient habitats (caves, forests, savanna) one can reasonably surmise that our most ancient of ancestors needed people to remain reliably alert - even to actively keep watch - through the night whilst the majority slept. Especially if the fittest and strongest members were absent, hunting night prey?
So perhaps our ancient ancestors needed elder females to consistently serve as Night Watch Women; protecting their familial and tribal groups and communities from predators - be they animal, or human members of other tribes? Especially pregnant and feeding women, infants, children, and other fertile women of child-bearing age. This kind of pro-natal protective behaviour is seen in bonobos also.
This presupposition could reasonably apply to elder men too, but I suggest women would be more reliably able to remain awake into or from the early hours, as a direct result of the greater insomniac effects of female hormones.
Perhaps the most sensitive members of the ancient tribes would have been most effective in this role, and thus boosted the survival prospects of biological lynchpin communities? Likewise those with greater levels of hormonal activity.
Perhaps this need gave an evolutionary advantage and reward to those communities with members with this adaptation?
Thus ensuring that the majority of women today experience some level of insomnia before menstruation and throughout perimenopause and menopause. And that there is a significant proportion of women today who have a greater sensitivity to this phenomenon.
I shall continue my studies, and publish in article format in the Jnana section of my website. Do get in touch if you have any relevant published neuroscientific research, insights or lived experience you wish to share ๐๐ผโฃ๏ธ.
Image is an abstract painting, titled 'Night Sky', which I painted a few years ago.