The purpose of this forum is to allow us to discuss subjects without them being trolled or +1d into oblivion.
I therefore wish to open a topic that would almost certainly need to be locked in General. Eugenics.
Applied preventatively in many countries around the world (though usually not described as such). Examples include:
United States - blood test prior to marriage in Indiana, Mississippi and Montana (mainly to test for syphilis) sometimes also test for geneticv incompatability. Public polls show support for eugenics to prevent inherited fatal genetic disease.
Israel - "Dor Yeshorim" - screening program for a range of genetic diseases used early in pregnancy, followed by voluntary ternmination. Blood tests are often also used for "matchmaking" (arranged marriages) to screen for genetic diseases common in the fairly inbred population. Positive tests can prevent the match,
Cyprus - prior to marriage both partners must be tested for the hereditary disease "thalassemia" - two positive tests legally prevent marriage/children.
China - carriers of certain genetic diseases may only marry if sterilized (some provinces also make the relevant health tests compulsory). Doctors may also rule a person "unfit" to marry/procreate.
Japan - forced sterilization and abortions for certain genetic disorders (+ leprosy).
Russia - forced sterilisation of pyschoneurologically or genetically abnormal persons (usually women).
Dysgenics is the concept that those with low intelligence generally have higher fertility than those with high intelligence, and thus we are evolving towards lower intelligence. Average genotypic intelligence (now that the "Flynn effect" appears to have ceased in many developed nations) is declining, in the US at least.
The term "positive eugenics" is one I've invented to refer to deliberate matchmaking of genetic stock in order to promote positive characteristics. This already happens on an individual level (It's rare, for example, for a PhD doctor to have children with someone who did not complete high school).
Personally, I want to aim for a Gattaca style system where we can gradually eliminate a lot of negative genetic traits. I also think appearance will only be relevant for another handful of decades before changing it easily will be possible, so I am not worried about "normalisation".