that keep their
|Adapted for the Internet from:
Why God Doesn't Exist
Arithmetic and exponential demographic growth
|This graph more or less depicts
the 2000-year demographic
history of Man. We grew more
orless arithmetically until we
reached the 1-billion mark
around 1820. Afterwards Man
entered an exponential regime.
Consensus is that during most of
the agricultural phase (i.e., the last
|10,000 years) women had a high fertility rate. In spite of this, the population did not increase
exponentially. The demographers believe that our high birth rates were offset by high
|At time T1 population P1 was
characterized by a regime in which
deaths balance out births.
Population increases very slowly.
The period of exponential growth
T2, in contrast, is distinguished by
a dramatic drop in deaths.
|Exponential growth occurs when children that would have otherwise died
before reaching puberty now reach maturity and produce children of their
own. Compounding this growth is a non-trivial arithmetic component: an
increase in the average life span of a human. Both factors are health-related
(i.e., improved living conditions and eradication of contagious diseases.)