Dating rocks with fossils
At the onset of the 20th century, most scientists had accepted the great antiquity of the earth, the theory of evolution and that humanity had evolved from an ape ancestor, but by 1908 the fossil evidence of early man was scarce.Biologists included principles from genetics in evolutionary theory during the 1920s and 1930s.Between the mid-1930s and mid 1940s geneticists, systematists and palaeontologists collaborated to create a united approach to evolution, the "Modern Synthesis".Ernst Mayr reduced all the hominid (human ancestor: (see hominid books)) fossil records to three species, A.Social forces appear to have directed much of the evolution of humanity but we are still subject to natural selection.Primate taxonomy (see books: phylogeny, taxonomy, systematics) is in a state of flux due to the discoveries made in primate genetics.( Adaptive radiation is the evolution from an unspecialised ancestral stock of many different species that adapt to a variety of ecological roles (see books)).
Widgets Human evolution from an ancestral primate species is not a vague hypothesis, but a historical fact.
This environment has a living (other animals) and non-living component (e.g. Widgets A unique adaptation usually precedes the entry into a new niche .
Tool use by our early ancestors is one such adaptation.
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I have integrated this web page on human evolution into an electronic text, " Nature's Holism - Holism.