It breeds, consequently, a healthy population whose natality, compared to its death-rate, is unusually high; but since the peculiar conditions of its surface and climate preclude the development of its internal food-supply beyond a point long ago reached, the surplus population which rapidly accumulates within it is forced from time to time to seek its sustenance elsewhere.
"The Ancient East"
D. G. Hogarth
Chicago, Nov 1907. Lewis, C.J. and J.N. natality and Fecundity.
"Consanguineous Marriages in the American Population"
George B. Louis Arner
If it were true, too, that civilization was a check to excessive natality, this phenomenon itself might make one hope in final equilibrium in the far-off ages, when the earth should be entirely populated and wise enough to live in a sort of divine immobility.
"Fruitfulness Fecondite"
Emile Zola