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Darwinism
When he proposed the theory of evolution through natural selection -
Founded New Branch
Darwin founded a new branch of life science, evolutionary biology -
Four Contributions
Four of his contributions to evolutionary biology are especially important, as they held considerable sway beyond that discipline. -
First
The first is the nonconstancy of species, or the modern conception of evolution itself. -
Second
The second is the notion of branching evolution, implying the common descent of all species of living things on earth from a single unique origin -
Third
Darwin further noted that evolution must be gradual, with no major breaks or discontinuities. -
Finally
He reasoned that the mechanism of evolution was natural selection.