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== Definitions ==
== Definitions ==
'''Change in the history of the universe.'''
'''Change in the history of the universe'''
This includes biological change, and non-biological change, such as galaxy formation. Evolutionist Theodosius Dobzhansky (1900-1975) said, "Evolution comprises all the stages of the development of the universe: the cosmic, biological, and human or cultural developments. Attempts to restrict the concept of evolution to biology are gratuitous."<ref>Quoted by Stephen E. Jones at [http://members.iinet.net.au/~sejones/evolut01.html http://members.iinet.net.au/~sejones/evolut01.html]</ref>
This includes biological change, and non-biological change, such as galaxy formation. Evolutionist Theodosius Dobzhansky (1900-1975) said, "Evolution comprises all the stages of the development of the universe: the cosmic, biological, and human or cultural developments. Attempts to restrict the concept of evolution to biology are gratuitous."<ref>Quoted by Stephen E. Jones at [http://members.iinet.net.au/~sejones/evolut01.html http://members.iinet.net.au/~sejones/evolut01.html]</ref>
'''The origin and development of life'''
Kerkut defined evolution as "the theory that all the living forms in the world have arisen from a single source which itself came from an inorganic form"<ref>''Implications of Evolution'', p. 157, by Kerkut, G.A., quoted in [http://www.creationontheweb.com/content/view/1627 Origin of life and the homochirality problem: is magnetochiral dichroism the solution?] by Jonathan Sarfati.</ref>
However, evolutionists today generally reject this definition, as it includes the origin of life ([[abiogenesis]]). [[Natural selection]] can only operate once life has started.
'''Universal common ancestor.'''
'''The development of life from a common ancestor.'''
This is the idea that there is some last universal common ancestor, from which all plants, animals, fungi, and other life on Earth are directly descended.
This is the idea that there is some last universal common ancestor, from which all plants, animals, fungi, and other life on Earth are directly descended.
Webster's dictionary put it as, "...the development of a species, organism, or organ from its original or primitive state to its present or specialized state; phylogeny or ontogeny"<ref>Quoted in [http://www.talkorigins.org/faqs/evolution-definition.html What is Evolution], by Laurence Moran.</ref>
'''Descent with modification'''
E.O. Wilson defines, "evolution is any change in gene frequency in a population." This is narrower than the first definition because it just includes biological change, and only those changes which are inherited.
== Use of different definitions ==
== Use of different definitions ==