Formula, I probably have a better grasp on the concepts of Biology than your average keyboard warrior don't you worry about that.
A few flaws in your reply actually.
A) It's not exclusively
us that does the selection for removal, but the environment. By the "environment" I mean any selective pressure eg competitors, predators, abiotic factors.
Recessive alleles that provide a disadvantage are slowly weeded out by either 1): Inheritors of homozygous copies of that allele not surviving long enough/ not being successfull enough at mating to pass on many copies of that allele to offspring. Yes, some do, but really should only be fancy rangas like Ed Sheeran, or Prince Harry. You know, guys with money and, going against all feminine urges, some kind of inexplicable pu$$y magnet that other rangas don't have (therefore do not get to pass on there genes to the next generation = loss of ranga alleles in gene pool).
Or 2: Fatal if inherited in a recessive pairing, which ranga is not, but definitely is a more at risk phenotype due to the propensity of short fuse brawling and other risky behaviours/ lack of tolerance to anything containing red food colouring, which puts them at risk of running infront of a bus/ out of a building/ off a cliff etc when exposed to red jelly beans/ raspberry soda/ fanta/ ribena etc.
Both of the above scenarios likely to reduce the % frequency of alleles over time.
My hypothesis is that these alleles do not display complete dominance, but rather, co dominance, which would explain the common phenotype "mousey freckler" or "ginger balls" on an otherwise brown haired individual.
B) The evolutionary advantage to fair skin is for greater Vitamin A absorption from the sun in cooler, shorter day latitudes such as Norther Europe.
Second point, there is no arguement that human population is growing at a rate that is unsustainable. Even if people in developed nations are having fewer babies than 40 years ago, that still leads to population growth. Especially as people live longer thanks to modern medicine, increased quality of life etc.
Heres a couple of graphs to consider. Link provided.
The second is of a typical population growth curve of a K selected species. Onces it gets to carrying capacity (K) the "wavy bit" at the top of the graph, that's when competition is so high that basically we are all at war with one another trying desperately to survive thanks to intraspecific competition.
Happy days :)
phys.org/news/2010-06-humans-extinct-years-eminent-scientist.html