Evolution is defined as a change in the genetic composition of a population over successive generations. Charles Darwin’s theory of evolution by natural selection was first presented in his book The Origin of Species, published in 1859. In evolution by natural selection. Genetic variation is essential for evolution. For a variation to contribute to evolutionary change, it must be heritable. Charles Darwin 1809–1882 is considered by many as the “father” of evolutionary biology for his scientific contributions, such as his theory of evolution through natural selection.