The dimensions, modes and definitions of species and speciation
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- Wilkins, J. Biol Philos (2007) 22: 247. doi:10.1007/s10539-006-9043-9
... evolution is a process of change or movement. Description of any movement may logically and conveniently be divided in two parts: statics, which treats of the forces producing a motion and the equilibrium of these forces, and dynamics, which deals with the motion itself and the forces producing it. Following this scheme, we shall discuss, first, the forces which may come under consideration as possible factors bringing about changes in the genetic composition of populations (evolutionary statics), and second, the interactions of these forces in race and species formation and disintegration (evolutionary dynamics).