ON THE ORIGIN OF SPECIES is Charles Darwin's controversial 1859 book which introduced evolutionary science to the world. In this eminently readable book for non-specialists, Darwin presents his arguments for the evolution of species through the process of natural selection. Darwin's theory has come to be regarded as the principal unifying theory of the life sciences and helping to explain the diversity of life on Earth.

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Charles Robert Darwin (1809-1882) was and English naturalist, scientist, and theorist, best known for formulating the theory of evolution, published in his 1859 book ON THE ORIGIN OF SPECIES.