Natural selection
2.
In Brief periods (Speciation/Adaptation): Natural selection becomes a creative, directional force, rapidly shaping new forms in response to changing conditions or new environments. The fossil record doesn't refute natural selection's creativity; it refines the tempo and mode of evolution from Darwin's original emphasis on slow, steady phyletic gradualism to the more empirically supported model of punctuated equilibrium. The creativity is real, but it is concentrated in rapid bursts, interrupted by long plateaus of stability.
(MUYLLE M. F. Designing and Developing Lifestyle with WisdomCC59-1)
Gnostotheca 9234