--- a/src/mikraite/Human_Evolution.html	Sat Sep 13 18:25:54 2025 -0600
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@@ -48,7 +48,7 @@
 
 <p>To summarize, enforcement of sexual fidelity strengthens a society by increasing trust among men and by changing women's mating preferences so as to cause positive evolution in the society.  Enough theorizing.  It is time to back up these ideas with facts.</p>
 
-<p>In the book <a href="http://mikraite.arkian.net/Sex-and-Culture-book-tp437.html">Sex and Culture</a> anthropologist Unwin analyzes the correlation between female premarital chastity and the level of development in all known isolated tribes of his time.  He finds that female premarital chastity perfectly correlates to the level of development, absolutely without exception.  Unwin was a rigorous scientist who insisted on using objective measures for his data.  He used objective data both to measure level of development and to measure female premarital chastity.  His book is lengthy, going into great detail for each of the 80 tribes analyzed.  Unwin then turns to history and studies rising and falling cultures.  Again he finds that all rising cultures require strict female premarital chastity (virgin wives) and that declining cultures typically don't enforce female premarital chastity.  Unwin was a liberal and probably an atheist, so he was actually very unhappy with his own findings since they contradict his own values.  So Unwin deserves enormous credit for having the intellectual honesty to publish his findings.  Of course his findings are so politically incorrect that his book is out of print and is avoided by the liberal academic establishment.  Unwin tried to explain his findings from a liberal perspective by saying that prenuptial chastity causes sexual repression which in turn causes energy to be redirected into developing culture.  Unwin admits that he has no basis for his theory.  And in fact history proves this theory to be false since most rising cultures had widespread prostitution which has no evolutionary impact but which alleviates male sexual repression.  An example would be Ancient Athens where men had easy access to prostitutes but where female chastity and sexual fidelity were strictly enforced.  So Unwin's theory is wrong.  On the other hand, his data perfectly supports the theory presented here that reproductive monogamy strengthens society.</p>
+<p>In the book <a href="https://www.amazon.com/Sex-Culture-Joseph-Daniel-Unwin-ebook/dp/B083113DMD">Sex and Culture</a> anthropologist Unwin analyzes the correlation between female premarital chastity and the level of development in all known isolated tribes of his time.  He finds that female premarital chastity perfectly correlates to the level of development, absolutely without exception.  Unwin was a rigorous scientist who insisted on using objective measures for his data.  He used objective data both to measure level of development and to measure female premarital chastity.  His book is lengthy, going into great detail for each of the 80 tribes analyzed.  Unwin then turns to history and studies rising and falling cultures.  Again he finds that all rising cultures require strict female premarital chastity (virgin wives) and that declining cultures typically don't enforce female premarital chastity.  Unwin was a liberal and probably an atheist, so he was actually very unhappy with his own findings since they contradict his own values.  So Unwin deserves enormous credit for having the intellectual honesty to publish his findings.  Of course his findings are so politically incorrect that his book is out of print and is avoided by the liberal academic establishment.  Unwin tried to explain his findings from a liberal perspective by saying that prenuptial chastity causes sexual repression which in turn causes energy to be redirected into developing culture.  Unwin admits that he has no basis for his theory.  And in fact history proves this theory to be false since most rising cultures had widespread prostitution which has no evolutionary impact but which alleviates male sexual repression.  An example would be Ancient Athens where men had easy access to prostitutes but where female chastity and sexual fidelity were strictly enforced.  So Unwin's theory is wrong.  On the other hand, his data perfectly supports the theory presented here that reproductive monogamy strengthens society.</p>
 
 <p>It is unfortunate that "Sex and Culture" is out of print.  I consider this to be the most important book written since Darwin's "The Origin of Species".  This book is what start my thinking about the issues discussed in this article.  I have managed to buy an original copy of this book and I would like to scan it and make it available on the internet someday.</p>