orthogenesis(redirected from orthogenesists)
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1. Biology The hypothesis, now largely discredited, that the evolution of species is linear and driven largely by internal factors rather than by natural selection.
2. Anthropology The hypothesis that all cultures evolve in a linear manner from primitivism to civilization.
or′tho·ge·net′ic (-jə-nĕt′ĭk) adj.
1. (Biology) biology
a. evolution of a group of organisms predetermined to occur in a particular direction
b. the theory that proposes such a development
2. (Sociology) the theory that there is a series of stages through which all cultures pass in the same order
or•tho•gen•e•sis(ˌɔr θoʊˈdʒɛn ə sɪs)
a. evolution of a species proceeding by continuous structural changes without presenting a branching pattern of descent.
b. a theory that such evolution of a species is due to a predetermined series of alterations and not subject to natural selection.
2. a hypothetical parallelism between the stages through which every culture necessarily passes in spite of secondary conditioning factors.
or`tho•ge•net′ic (-dʒəˈnɛt ɪk) adj.
progressive evolution, leading to the development of a new form, as can be seen through successive generations. See also society. — orthogenetic, adj.See also: Biology
progressive evolution, leading to the development of a new form, as can be seen through successive generations. See also society. — orthogenetic, adj.See also: Evolution
the sociological theory that all cultures or societies follow the same fixed course of determinate evolution. See also evolution. — orthogenetic, adj.See also: Society