Ethically and legally? Probably not. But, if we’re looking at just “is this within the realm of probability with current technology” then the answer is “yes, maybe.” Understand, of course, that it’s not going to be something we could start working on tomorrow and that the suggestions on what to do range from mildly terrifying to downright scary. However, if your end goal is more women in science and you don’t care much about the means used to achieve that goal (which probably makes you part of the crowd clutching their pearls and fainting over a shirt), then consider this ground zero for your completely terrible campaign.
Even the Master is horrified by your callousness
The first thing we’ll need to do is figure out what determines and creates the different temperaments. There’s a lot of debate over this. Temperament does seem to be extant from birth and observable in infancy (though, again, that’s somewhat debatable). It’s unknown if temperament is genetic, if it’s encoded into a specific gene or series of genes, if it’s inherited but not genetic, if it’s a result of chemical washes in utero during fetal brain development, or if it’s just the result of something spinning the Wheel o’ Temperament and bam — you get whatever the arrow’s pointing to when you exit the birth canal. It could also be influenced by various environmental and nurturing factors in infancy. So, the first step is to:
- Collect several hundred thousand pregnant women of various races, age ranges, ethnicities, nationalities, sexual orientations, socioeconomic levels, and marital statuses. Note down who is who and then assign each one a random testing number so that a proper double-blind study can be done.
- Monitor maternal food and liquid intake and output, noting the times and frequency of hunger, elimination, and strange cravings. Also monitor maternal emotional levels and stress levels.
- Figure out a way to determine the exact hormonal levels being washed over the fetus in utero at each stage of pregnancy and note those down.
- If the mother chooses to breastfeed, continue to observe intake-output of maternal nutrients until the child is weaned.
- Test each child to determine temperament/personality type at an appropriate age (usually no earlier than 17).
That concludes the first part of this process. Once you’ve determined which children are NTs, go back over the data gathered earlier and try to tease out the commonalities in maternal (and paternal) traits. Did the mothers all experience similar hormonal washes during their pregnancies? Did they tend to eat or crave certain foods as a class? Note down all commonalities among the parents and prepare to proceed to the next step.
- Collect males and females with traits most likely to create an NT child (if there are any).
- Impregnate the females with sperm carrying only the X chromosome.
- Monitor each pregnancy to ensure that the proper foods, drinks, and in utero hormonal washes occur, terminating any that seem likely to be an non-NT temperament.
- Ensure that the parents use only child-rearing methods that were found in homes with INTJ children from phase one.
There, you should have a new generation of pure NT females now. Provided, of course, that temperament is determined this simply. If you repeat these steps over the course of enough generations, you might be able to extinguish all of the non-NT temperaments in the human race, leaving a world only of Rationals. Of course, at future steps, you will need to breed some male children (after all, it’s hard to reproduce sexually when there’s only one sex and even if you can, that has its own problems) but you should be able to figure out how to create male NT children and how to ensure that their children will be NTs.
Also, added “bonus:” you should be able to use the data from phase one to determine the commonalities for the other three temperaments so if you decided that one of them needed a greater population, you could selectively breed them.
And if we add more of this, we’ll get a batch of nice ESFPs…
Of course, if you actually try to do this, you’re probably a terrible person. You’re completely eliminating choice and freedom in mating and reproduction for both men and women but you will get more female scientists. If that is your end goal and you don’t care how ethically it’s achieved, then you’ll be okay with placing restrictions on humans having sex with partners of their own choice at times of their own choosing. You’ll get what you want but only at the price of virtually enslaving millions of women and making reproductive decisions on their behalf.
Which probably makes you a feminist and a social justice warrior but almost absolutely precludes you being a Rational.
— G.K.