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Widgets Human evolution from an ancestral primate species is not a vague hypothesis, but a historical fact.Archaeological geology as a science had to precede the proposal of evolution, as an understanding of the immense age of the earth is necessary to understand evolution.
 Natural selection, gene flow and random genetic drift (the random change in gene combinations with each generation) drive evolution, resulting in a change in gene frequencies within populations .
Ernst Mayr reduced all the hominid (human ancestor: (see hominid books)) fossil records to three species, A.
africanus (Dart, 1925) (including small brained australopithecines) (see books), H.
When it decays it forms thorium-234 which is also unstable.
Finally, after a series of radioactive isotopes are formed it becomes lead-206, which is stable.
Without the universal acceptance of the principle of evolution, there is no chance for the serious proposal of holism.