How Many Years Does A Generation Span?

and unless i did it all wrong, my internet searches were futility in action.

growing up ( late 1960s and 1970s ) my concept of a generation span was 33 years.
i have not thought about this for a long time, but recently, every mention of a generation span
appears to be, basically, 20 years.

did i miss a memo when this was redefined?? or what? i don't know.
guess the only thing i can do is blame those darn millennials

 

Depends how fast your tribe breeds

I've always thought of it to be ~25 years.

 

There are a number of factors that can influence the length of a generation.
Race, ethnicity, culture, religion, tradition, etc. all play a role.
Here's an interesting read.
https://isogg.org/wiki/How_long_is_a_generation?_Science_provides_an_answer

 

It depends on how horny they are.

One male and one female could produce up to 12 children in one or two years.Do you remember the story about one husband and wife that has 6 children.I think that's called having sextuplets.There is another mother that had 17 children.You do the math.

I think there is a law in china that was passed with one couple from having more then two kids.

As Eldon said There are a number of factors that can influence the length of a generation.In which i agree with.

Look at vitro fertilization for instance.A women can have children with out have a male present.

They could be a gay couple.

 

Generation length has little if anything to do with the numbers of children produced, it's more to do with the relative time between generations when those births take place.

A 'normal' generation in a particular region might currently be 25 years between a mother and her daughter producing offspring, but what if some disaster occurs; war, epidemic, extreme social, financial or climatic events, etc. and most of the 16-40, or 4-20 year olds are removed, or remove themselves, from the current or next breeding generation in some way?

 

ok, thanks,
i don't know how i missed the isogg site,
but that was what i was looking for.

guess i was letting the media influence me
with all their talk of baby boomers / gen X / gen Y / millennials / etc etc
which seems to be newly defined every 10 years.

 

Here's an interesting chart.
http://chartmix.co/view/MYB7ywk#data

Youngest mothers.
https://www.worldatlas.com/articles/countries-with-the-lowest-mother-s-mean-age-at-first-birth.html

Oldest mothers.
https://www.worldatlas.com/articles/countries-with-the-highest-mother-s-mean-age-at-first-birth.html

 

Not really if that one child lives to be 80 or 100 in between that time that current child could have far more children then what there parents originally did.It basically starts from the source.

But yes there are KEY factors.like you said.

Like for say if you ever played the sims 3.In the game there are Key factors to having more then one generation.If the one sim couple could mate.And have more then 2 kids.Then out of them two kids one could have one or two children while the other has like 12 or more.

Every thing will very in life.