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To: Hawkmoon who wrote (85369)12/31/2011 2:21:58 PM
From: elmatador1 Recommendation  Respond to of 219655
 
That what you wrote plus: Women seeing chances of survival of one or two offspring, does not need to produce a lot of them.



To: Hawkmoon who wrote (85369)12/31/2011 6:50:50 PM
From: skinowski1 Recommendation  Read Replies (2) | Respond to of 219655
 
Goldman (Spengler) in his book How Civilizations Die quotes studies about the fertility of Iranian women. It seems that the single most important determining factor was simply.... literacy. Simple country girls were having 7, 8 children and more. As soon as they learn how to read, their fertility crashes below replacement levels (2.1), to levels as low as in most of Europe.

It really is serious business, and it can happen fast. A 100 individuals with an average 1 child per family within 2 generations would have among them 25 grandchildren.