: Darwinism is a theory of biological evolution developed by the English naturalist Charles Darwin ( 1809-172 ) and others, who stated that all species evolved and developed through natural selection of small and inherited mutations that competed with the individual. , Increases survival , and reproduces. Darwinian theory is also said to have included a broader concept of species or evolutionary synthesis , which Darwin's Theomanian Theomas Henry Huxley predicted Darwinism theory, including the general adoption of Darwin's Origin of Species in 1899.