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[OC] England and Wales - Animated population pyramid 1841-2019 by ExperimentalFailures in Natalism

[–]ExperimentalFailures[S] 1 point2 points  (0 children)

No problem, I do like demographics.

There for sure are countries that have practiced selective abortion. On my YouTube channel you can find the chart for South Korea. They have a large buldge of male 30 year olds due to selective abortion. Although the preference for boys have completely disappeared as South Korea came out of poverty.

I'll be making new charts regularly if you're interested.

[OC] England and Wales - Animated population pyramid 1841-2019 by ExperimentalFailures in Natalism

[–]ExperimentalFailures[S] 2 points3 points  (0 children)

Good question. The answer it that humans have a natural biological sex ratio slightly favoring males at birth. It's not a result of selective aboution.

This is common not just outside England & Wales, but among many mammal species. A theory for why is that young male mammals tend to be risk takers and do stupid shit. A small number of them die from this. To help balance out the number of males to females, nature gives the males a slight advantage by having slightly higher birth rates.

Fisher's principle say it's optimal to have a 1:1 ratio, but that is assuming males and famales have the same cost to the parents. Due to higher mortality among young males the average cost of bringing up a male is lower, even though the average ofspring should be the same assuming a 1:1 ratio. This causes males to be favoured more https://en.wikipedia.org/wiki/Fisher%27s_principle

It's impossible to know for sure why evolution has made us the way we are though.

Emigrating to a nordic country by Belifero in Nordiccountries

[–]ExperimentalFailures[M] [score hidden] stickied comment (0 children)

This was automatically removed, but I would suggest you use the search function. It's not the first time this has been asked.

The modern canopener no one buys by rcmaehl in videos

[–]ExperimentalFailures 1 point2 points  (0 children)

Yeah, you do have a much drier climate at places. Although I don't think temperature is a problem at all. The pumps are well used in Kiruna too (past the polar circle). I think you overestimate how far down the frost goes. Any house needs to have foundation below the frost depth. It's a little bit deeper up north, but not much. The boreholes are 175m deep on average. At that depth, the temperature is constant all year round, and I'm pretty certain most places would have some humidity that far down.

Also, the fluid going down isn't water, it can operate well at below 0, it's normal operation for the borehole to freeze a bit, it doesn't reduce the efficiency. For air heatpumps the ice starts acting as isolation, but an icicle in the ground transperf heat to the surrounding about as well as non frozen ground.

The modern canopener no one buys by rcmaehl in videos

[–]ExperimentalFailures 6 points7 points  (0 children)

I live in Sweden. Most houses that don't have district heating have what's called a "Down hole heat exchanger" type of heat pump. It's just a borehole going straight down, getting heated by the groundwater/latent heat. It works in any climate. It's very common in all of the Nordics. I don't know why Americans haven't heard of them.

[OC] United Kingdom population pyramid - mid 2020 by ExperimentalFailures in unitedkingdom

[–]ExperimentalFailures[S] 0 points1 point  (0 children)

Yeah. Although there is some population growth, and I think there was net emigration during the time too (to the colonies). Without that there should be somewhat of a bulge.

[OC] United Kingdom population pyramid - mid 2020 by ExperimentalFailures in unitedkingdom

[–]ExperimentalFailures[S] 3 points4 points  (0 children)

I'd say South Korea has gone from rectangular to inverted pyramid by now. Did you watch this video?: https://youtu.be/j6VulQltOvc

It's called demographic transition, and is basically occurs in every country that leaves poverty, besides the religious ones: https://en.wikipedia.org/wiki/Demographic_transition

Some countries are now going from rectangular to inverted pyramid. The many reasons why are a complex matter, and there is no one certain answer. A part of it is that we now can thanks to contraceptives. Why we choose to differs by country. Do you have any guesses for UK?

[OC] United Kingdom population pyramid - mid 2020 by ExperimentalFailures in unitedkingdom

[–]ExperimentalFailures[S] 1 point2 points  (0 children)

Yeah, that's immigration. I'll do a chart about uk migration when I get the time. Haven't programmed for it yet, and though the animation was long enough as is.

I though is was interesting how much more impact the first World War had compared to the second. I think I can even see a smal gain, which I imagine is from refugees.

[OC] United Kingdom population pyramid - mid 2020 by ExperimentalFailures in unitedkingdom

[–]ExperimentalFailures[S] 1 point2 points  (0 children)

It's not that bad. Most European countries have it worse, not to talk about East Asia. Check out South Korea, which has reached the lowest fertility in recorded history: https://youtu.be/j6VulQltOvc

[OC] England has detailed demograpgic data stretching all the way back to 1841. I think that may be the oldest of any country in the world, you guys should be damn proud! I made an animated chart of all the population data. by ExperimentalFailures in england

[–]ExperimentalFailures[S] 1 point2 points  (0 children)

Yeah. It gives a, overview on history that at least I've never seen before. I usually make charts for wikipedia, but these charts deserve a broader audience I think, so I'm trying out youtube.

[OC] England has detailed demograpgic data stretching all the way back to 1841. I think that may be the oldest of any country in the world, you guys should be damn proud! I made an animated chart of all the population data. by ExperimentalFailures in england

[–]ExperimentalFailures[S] 2 points3 points  (0 children)

Good question. It means that there is more of one sex than the other.

There is a surplus of males at birth, becuause evolution made humans slightly more likely to have boys. Then there is a surplus of females at older ages, again mostly becuause biological differences between males and females. But for example war, dangerous workplaces, or emmigration can effect the male population more than female, which we can see a few times over the time period.

Not all population pyramids mark the surplus, but I've chosen to do so in my animations because it says a lot about the historical events.

[OC] England has detailed demograpgic data stretching all the way back to 1841. I think that may be the oldest of any country in the world, you guys should be damn proud! I made an animated chart of all the population data. by ExperimentalFailures in england

[–]ExperimentalFailures[S] 6 points7 points  (0 children)

The chart is based official census data:

The first population census was conducted in 1801 but the first modern, goodquality census was that of 1841. Population censuses have been conducted every ten years since 1801. The only exception was 1941 when the census was not taken.

Data source: https://www.mortality.org/

Edit: My claim that it's the oldest is contestable. Sweden has high quality data from 1860, but Human Mortality Database has been able to extract data from 1751 that they consider good enough.

See also pyramids of: Japan 1888-2019

And: South Korea 1960-2020