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From: "Kenneth Nordtvedt" <>
Subject: [DNA] Domesday
Date: Sun, 4 Dec 2011 13:40:59 -0700


At time of Domesday Book in England, 1086, population of England is estimated to be 2 million. Today it is about 50 million.

My computer says growth factor of 25 = 50/2 raised to the 1/30 power (30 generations of reproduction) yields average growth rate of 11 percent a generation from 1086 AD to now.
That means in the centuries before industrial revolution it was even lower than 11 percent on average.

A clade founder 140 generations ago (think I1 founder) with average growth rate of about 11 percent a generation yields a recent population of about 2 million.
That’s in the ball park of the pre-industrial I1 male population of the world.

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