Darwin's theory of natural selection helped to convince most people that life exists in its present form as a result of evolution, rather than a random series of inexplicable miracles. The first is that they confirmed the belief that all organisms distribute changes from a common ancestor, which supported the theory of evolution almost conclusively. The second is that scientists are no longer forced to question whether evolution is fact or fiction.
Evolution is considered to be a scientific fact.
Darwin introduced the concept of species changing and adapting slowly over time, and surmised that those adaptive change most often occurred via the mechanism of natural selection. Darwin s observations showed that many distinctively diverse organisms of plants and animals were related through some yet to be discovered explanation. An additional element of Darwin's theory encompasses the variance in the physical and habitual traits of each species. This is the area in which the Survival of the Fittest theory most often comes into play. Darwin asserted that in order for a species to cope with the ever changing environments and circumstances it is subjected to, it must not only adapt, but must also be capable of passing on those adapted characteristics to its offspring.