This question is related to How Did Ussher Determine That the World Began on "Sunday Evening, October 23, 4004 B.C."?
From a Christian perspective (i.e., beginning with the premise that the human race is approximately 6,000 years old)---has anyone come across an estimate (with underlying justifications) for the number of souls that have thus far existed on earth?
Of course, such can only be an educated guess based on a mathematical model with certain underlying assumptions. In fact, I recently looked over an article published in 1996 by the MAA entitled "How Many People Have Ever Lived"---but the model used therein was merely an exponential growth model which is clearly erroneous as it gives no consideration to the carrying capacity of the earth.
One need not be a mathematician to answer this question, as I would be very happy with a good reference or two pointing me to appropriate literature. Perhaps some astute Christian considered this problem centuries ago? Does anyone know of one?
QUESTION: How many souls have ever lived? Who has considered the problem (not from a standpoint of strict exponential population growth) from a Christian perspective; and where may I find the literature?