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During his vist to Tierra del Fuego left him unsettled leding him to write " difference between savage & civilized man is.- It is greater than between a wild & domesticated animal" That even the lowest races were capable of improvement.
Adrian J. Desmond, Encyclopaedia Britannica, September 6, 2018, "Charles Darvin", access November 23,2018, www.britannica.com/biography/Charles-Darwin/On-the-Origin-of-Species -
During his early days one the voyage on the Beagle left him wondering why beautiful creatures like the plankton teemed in the oceans vastness where no human could appreciate them
Adrian J. Desmond, Encyclopaedia Britannica, September 6, 2018, "Charles Darvin", access November 23,2018, www.britannica.com/biography/Charles-Darwin/On-the-Origin-of-Species -
During this phase Darwins suggested that the belief in God was ingrained tribal survival strategy
Adrian J. Desmond, Encyclopaedia Britannica, September 6, 2018, "Charles Darvin", access November 23,2018, www.britannica.com/biography/Charles-Darwin/On-the-Origin-of-Species -
Darwin became well known through his diary's publication, Journal of Researches into the Geology and Natural History of the Various Countries Visited by H.M.S. Beagle
Adrian J. Desmond, Encyclopaedia Britannica, September 6, 2018, "Charles Darvin", access November 23,2018, www.britannica.com/biography/Charles-Darwin/On-the-Origin-of-Species -
His studies of the sexual differentiation of barnacles sparked his interest in the evolution of diverging male and female forms from an orginial hermaphrodite creature that made him a world exper and gained him the Royal Society's Royal Medal
Adrian J. Desmond, Encyclopaedia Britannica, September 6, 2018, "Charles Darvin", access November 23,2018, www.britannica.com/biography/Charles-Darwin/On-the-Origin-of-Species -
he solved his last major problem the forking of genera to produce new evolutionary branches and profected his analogy of natural selection
Adrian J. Desmond, Encyclopaedia Britannica, September 6, 2018, "Charles Darvin", access November 23,2018, www.britannica.com/biography/Charles-Darwin/On-the-Origin-of-Species