Scotch-Irish-L Archives

Archiver > Scotch-Irish > 1998-02 > 0886384795

From: "Michael G. Kelly" <>
Subject: Generational arithmetic
Date: Sun, 01 Feb 1998 17:59:55 -0800

If none of your ancestors intermarried you would have more than a billion
great x 28 grandparents after 30 generations. This would put you back
around the 11th or 12th century when the world's population was only
around 500 million, give or take a 100 million. Obviously this is an
impossibility and there must have been lots of intermarriage.

The world's population did not reach 1 billion until early in the last

Michael Kelly

This thread: