Human sociogeophysics — Phase II the difussion of human ethnicity by remixing

Abstract

The spread of the species, man, on the surface of the earth has been described physically in two initial phases. In a first phase, 40,000–15,000 ybp, man spread to occupy all of the temperate and periglacial regions of the earth as a constant density occupational expansion of about 0.04 persons per sqkm. As of 15,000 ybp, the population might be estimated to be about 4 million, the birth (and death) rate to be about 0.03 per year, and the Malthusian constant (the net increase of population — birth minus death rate) to be about 0.0002 per year. This phase represented a diffusion of ethnicity (breeding populations) with little remixing. In a subsequent second phase, e.g., 15,000–2,000 ybp, through the Mesolithic, Neolithic, and post-Neolithic phases, while condensations to agriculture and to civilizations took place, even though the populations grew to about 180 million with considerable remixing, the Malthusian constant effectively did not change. Thermodynamically (that is as the irreversible thermodynamics of a hydrodynamic field), this result suggests that the persisting demography of a viable species has to be driven by a positive definite Malthusian growth constant beyond a zero thermodynamic equilibrium. It is also suggested that if that constant is globally zero or negative, the species will die. The possible existence of various stability regions (transformations in dynamic states) is also implied.