Charles Darwin is one of the best known figures in the field of natural biology. He is most remembered for his work on the natural selection and theories of evolution. According to Charles Darwin, the earth had a few ancestors who were the forefathers for all the present day species and living beings. These few ancestors were the first life organisms on earth and that this process of spreading out to a larger group from a few ancestors is called as evolution. Evolution is the basis of formation of new life on earth and sustenance of already existing life forms. According to Darwin, evolution was a slow, long and continuous process, in which survival of the fittest is the most essential and influential component. Struggle for survival would exist forever, till life forms existed on the planet. These theories of Darwin were controversial at that point of time and Darwin never spoke of the sociological implications of the findings which he did during the period 1831- 1836 while on a nature expedition around the world. He is supposed to have renounced the theory of evolution on his deathbed according to a nun who was at his side at his deathbed.
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