Sunday, 10 June 2018

The sterilization of females

Memes can sterilize you, or dramatically reduce your fertility. This is true especially if you are a woman. The correlation between female education and fertility is strongly negative:

This isn't just a case of memes making people richer and r/K selection adaptively kicking in. The phenomenon is powerful enough to reduce fertility to sub-replacement levels - as seen in South Korea, Japan, and many other countries.

In memetics, the explanation for this is fairly obvious - diverting resources away from gene reproduction fuels meme reproduction. It is thus a common interest of many memes to sterilize their hosts. Dawkins gave this as an explanation of priest infertility in 1976 and the basic idea has held up.

If you consider memes as cultural symbionts, then this phenomenon may seem familiar. Many parasites also sterilize their hosts. Many human STDs do this, for example:

It is widely accepted that bacterial infections with Neisseria gonorrheae, Treponema pallidum and Chlamydia trachomatis can lead to fertility alterations. The impact on reproduction alteration is suggested but not well understood in the case of some viral STI, such as human herpes virus (HSV), adeno-associated virus, human immune-deficiency virus (HIV), human cytomegalovirus (HCMV) and human papillomavirus (HPV).
HPV is one of the better-known ones. It gives women cervical cancer and blocks up the tubes of their reproductive system with cancer cells.

Sybiont foodstuffs such as green leafy plants also frequently attempt to sterilize those that consume them. This prevents further consumption of the plant by offspring, and attempts to consume relatives. Phytoestrogens are a common method. These bind to the estrogen receptor and so defeminize many animals.

At this point, you may have noticed a theme. The targets of these attacks on the reproductive system are frequently female. It seems easier to sterilize females than it is to sterilize males. I notice that most human contraceptives also target women. If you look into forced human sterilization, the majority of victims there are women as well.

Why is it easier to sterilize females? I don't know the answer to that, but I have some ideas. Not all species have males. The female reproductive tract is mostly shared with those that reproduce asexually. Another factor might be that if population reduction is the aim, sterilizing males would not work unless you got almost all of the males. If you sterilize one male another can easily take his place. That is not so true of females. I'm not sure that these ideas explain all of my examples, though.

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