Showing posts with label evolution. Show all posts
Showing posts with label evolution. Show all posts

Wednesday, August 08, 2007

How the English Evolved

While researching his new book, A Farewell to Alms, Gregory Clark wondered if the descendants of English people who survived disasters like the Black Death gained, through natural selection, a greater resistance to disease. This greater immunity, he supposed, might help explain how the Industrial Revolution came about.

In support of the disease-resistance idea, cities like London were so filthy and disease ridden that a third of their populations died off every generation, and the losses were restored by immigrants from the countryside. That suggested to Dr. Clark that the surviving population of England might be the descendants of peasants.

A way to test the idea, he realized, was through analysis of ancient wills, which might reveal a connection between wealth and the number of progeny. The wills did that, but in quite the opposite direction to what he had expected.

Generation after generation, the rich had more surviving children than the poor, his research showed. That meant there must have been constant downward social mobility as the poor failed to reproduce themselves and the progeny of the rich took over their occupations. “The modern population of the English is largely descended from the economic upper classes of the Middle Ages,” he concluded. [Link]
As the wealthy dropped in social status, says Clark, they passed down (culturally, or perhaps genetically) their capitalist values to the workforce that drove the Industrial Revolution.

Most of my ancestors sat out the Industrial Revolution, and, in light of my life of abject poverty, I'm guessing I lack the capitalism gene. I'm well suited for serfdom.

Monday, July 16, 2007

Female Finn Twins Just Can't Win

Virpi Lummaa's interest in Finland's copious church records is purely statistical.

The 33-year-old Finnish biologist, aided by genealogists, has pored through centuries-old tomes (and microfiche) for birth, marriage and death records, which ended up providing glimpses of evolution at work in humanity's recent ancestors. Among them: that male twins disrupt the mating potential of their female siblings by prenatally rendering them more masculine; mothers of sons die sooner than those of daughters, because rearing the former takes a greater toll; and grandmothers are important to the survival of grandchildren. [Link]

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