Ugh, no one is thanking the individual person who had >five kids for helping save our retirement safety nets at the expense of more emissions. Has anyone thanked my foolish self for buying a new car in 2008 when auto companies were being bailed out? Nope.
Those who choose not to have kids because they feel it makes the biggest positive impact on the environment should absolutely be thanked.
@wenchsenior, not sure what you mean - please elaborate.
@RetiredAt63 , I definitely agree with you on the point about humans being a major impact on this planet. I am reminded of the anthropology book Sapiens, where the author says that homo sapiens have been the world's largest serial killer. It was a funny line, but rings true. And he backs it up with examples, such as how the Australia continent irreversibly changed more in 1k years after the first standing two legged creature set foot on the outback 50k years ago than something like 500k years before that. The migration from the south pacific island didn't happen because of natural evolution steps (we didn't grow gills to swim over to Australia) but had more nonlinear evolutionary steps such as building a canoe that allowed us to side step common evolutionary paths.
I was just agreeing with RetiredAt63, pushing back on Vand's overwrought statement.
Yes, that post made me wonder how many children Vand has.
Michael in ABQ, when I read you have a van for a family of 8 I was really hoping that was for 3 children, 2 parents and 3 grandparents. 6 children is basically what my grandparents had - my grandparents who were born in the late 1800s and had their children in the early 1900s. Of course if those 6 children are a singleton and then quintuplets I am all sympathy. If they are 6 singletons my sympathies are all with your wife.
And just in general, given the spreadsheet proficiency of most people here, I recommend that anyone/everyone just do a nice predictive calculation of population size while playing around with # children and how long the generations are. Having 2 children when you are 22 and 24 is going to be more demanding on resources than having 2 children at 32 and 34. It is easier if you do it just for women having daughters, then the replacement # of children is 1. That is how wildlife biologists do population growth calculations, one for the females, and if necessary because of breeding patterns, another for the males. A really good book for this is Ecology and Field Biology by Smith and Smith. But any decent Ecology text will show this.
And in case anyone is wondering if I practice what I preach, I had one child and I was in my very late 30s at the time.
I’m sorry maybe I’m not following but what is the reasoning that having kids later in life is less demanding of resources? Are you referring to the monetary resources of the parents because in theory they would be more established or are you implying it’s less demanding of environmental resources…
Definitely the less demanding of resources. It is basic population biology. If you don't want to look at all the math, go down to the end. But it is worth looking at because small differences can lead to big changes.
Let's just deal with the female side - assume the male side is also doing much the same thing.
A young woman has a daughter at 20. Her daughter has a daughter at 20. And her grand-daughter has a daughter at 20. And so on. So they all got to have a replacement child. No dying off of family lines or anything.
Le's add dates. First woman was born in 2000. So daughter is born in 2020, and we have 2 people. Grand-daughter is born in 2040 and we have 3 people. Great-granddaughter is born in 2060 and we have 4 people. Sometime in the next 20 years, before the next daughter is born, the first one dies of old age. So we will continually have 4 women.
OK, first daughter at 30, each succeeding daughter at 30.
So 2000, 2030, 2060, 2090. In 2060, where there were 4 people alive when the generation size was 20 years, here we only have 3 people alive because of the longer generation size. That 4th person isn't due for another 30 years, and by then the first one will have died.
Multiply that by 1000 and we have 3000 versus 4000. Multiply it by 100,000 and we have 300,000 versus 400,000. And see what a difference it makes?
Historically I would have wanted to do a separate one for men, because historically there was often a large enough age gap that it would make a difference. But people are tending to marry (or equivalent) within roughly their own age group these days. So the men would be similar.
Let's be a bit more extreme. She has her first daughter at 35, and her daughter does the same. This is basically my family, by the way, babies in our 30s.
So 2000, 2035, 2070. Oops, we missed 2060, in 2060 there were only 2 women alive.
That is the power of extending having babies to later in life.
Let's look at societies where girls marry young and have babies young. And let's assume that they still live in an area with horrible health care, and still only have that one daughter. So married at 15, first daughter at 16, 16 year gap between generations, but the women are tough (they would have to be!) and make it to 85.
We now have 2000, 2016, 2032, 2048, 2060. 5 women alive.
Let's look at more than one daughter. Say everyone is having 3 children, half and half, so I am going to switch to 1000 to avoid messy fractions. On average that is 1.5 daughters.
20 year generation time:
2020, 1000
2020, the original 1000 plus 1500 (1.5x1000) daughters = 2500
2040, the original 1000 plus the 1500 daughters plus 2250 (1.5x1500) grand-daughters = 4750
2060, the original 1000 plus the 2500 daughters plus 2250 grand-daughters plus 3375 (1.5x2250) great-granddaughters = 8125
Back to looking at 1 instead of 1000, we had 4 total with one daughter, we have 8.125 total for 1.5 daughters. So think of the quiver-full people , or anyone really, who are having masses of children- they are really using up resources. I am not going to do the math for 6 daughters, way too depressing.
The other interesting thing is that you don't need to have 1 baby policies. If almost everyone stops at 2 , the ones who have one more and the ones who have one less don't really affect the numbers much. If there are more families who have 1 child than there are families that have 3 children, then the population size will slowly decline. If they wait to have the children, the population will also slowly decline, without huge social upheavals.
This isn't even looking at social pressures to have more sons than daughters. This is just straight numbers.
By the way, this is a favourite topic in SF. Because in a colony, there may be reasons to have lots of children quickly, but there may also be limited resources and the push is to have fewer children, and later, not more earlier. Even assuming the new environment doesn't affect fertility in very negative ways. So how does a new society manage its reproduction?