Evolution is an explanation, compatible with the limits of the human natural mind for observed life and order, to satisfy those who cannot accept the notion that there is, in the universe a dimension of understanding and power above the ability of finite man to comprehend, known as the supernatural.
This is not so much a definition of evolution specifically as it is a definition of science. Science, by definition, precludes the supernatural as an explanation. Which isn't, nessicarily, to ay it doesn't exist - it just can't ever be a scientific explanation. If it were, it would cease to be "supernatural".
Evolution is a theory contrived by one and believed by most which attempts to explain the observed existence of life and order solely by billions of random/chance happenings and interactions involving things pre-existing for no explicable reason.
This is also incorrect. Evolution as a modern theory and model is the result of the efforts of hundreds of scientists. Strictly speaking, evolution as a theory predates Darwin, even. Darwin may have planted the seed for the modern theory but it is by no means his alone.
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