Perhaps no one has influenced our knowledge of life on Earth as much as the English naturalist Charles Robert Darwin (1809-1882). His theory of evolution by natural selection, now the unifying theory of the life sciences, explained where all of the astonishingly diverse kinds of living things came from and how they became exquisitely adapted to their particular environments.
The Complete Work of Charles Darwin Online (or Darwin Online) began in 2002 to assemble in one scholarly website all of Darwin's published writings and unpublished papers. It is the largest and most widely used Darwin resource ever created. More copies of Darwin's works have been downloaded from Darwin Online than were published in Darwin's lifetime or in the whole of the 19th century.
The site contains over 77,000 pages of searchable text and 188,000 electronic images. It contains at least one exemplar of all known Darwin publications, reproduced to the highest scholarly standards, both as searchable text and electronic images of the originals. The majority of these have been edited and annotated here for the first time.