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re: Study: All Humanity Comes From One Couple.................... You don't say
Posted on 11/29/18 at 9:40 am to Azkiger
Posted on 11/29/18 at 9:40 am to Azkiger
quote:
Yea, it's almost as if having a crazy high pregnancy/infant mortality rate and having a life expectancy of 30 years or so affect population growth.
We can go at this in many ways, but I suggest we take all of the evidence to paint a picture.
You are saying that people had a life expectancy of 30 years. I suggest that is not known but we will go with it.
- Women can conceive as soon as they start having a menstrual cycle. let's go with 13.
- You state 30 years was the life span. That's the possibility of 17 kids. if we hold to the STRICT death at 30 and give birth at 13.
2
Posted on 11/29/18 at 11:50 am to Jjdoc
quote:
- You state 30 years was the life span. That's the possibility of 17 kids. if we hold to the STRICT death at 30 and give birth at 13.
That makes the assumption that no women on-demand breast fed their child which is a 99% effective form of birth control over 6 months and 80% effective over a year. Makes the assumption that no pregnancy resulted in miscarriage. Makes the assumption that no abortion was performed. Makes the assumption that the mother would survive all 17 births.
It also makes the assumption that modern menarche age applies to a time where nutrition would have been a huge barrier and also implies that nutrition was good enough for a woman to be capable of conception each time.
This post was edited on 11/29/18 at 11:51 am
Posted on 11/29/18 at 12:08 pm to Jjdoc
quote:
- You state 30 years was the life span. That's the possibility of 17 kids. if we hold to the STRICT death at 30 and give birth at 13.
That logic also states that women have the possibility of having ~27 kids today.
How many are they actually having? Even your sub-Saharan African countries aren't even averaging 1/3rd of that. Taking a third of your 17 child figure leaves us with less than 6 kids per woman, and that's assuming the woman actually lives through all the child births and starts having children right off the bat.
This post was edited on 11/29/18 at 12:13 pm
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