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Should Evolutionary theory apply to human beings in the same way as to other forms of life Up until the mid 18th century the most commonly held belief was that all species were immutable that they remained exactly as they were when they were first created A new theory has to come to light however which drastically reassessed this point of view Evolutionary theory suggests that all forms of life have a common origin and that over time species evolve or develop into a different form The main theorist behind the theory of evolution is Charles Darwin Darwin called the process of evolution Natural selection This suggests that variations in all living organisms can arise and that these variations in certain situations can be advantageous or disadvantageous It is thought that the organism which develops variations which are advantageous to its particular environment are more likely to survive and to reproduce their species with their descendants inheriting any advantageous characteristics Those organisms without advantageous characteristics are thought to eventually die out and become extinct It can be said then of natural selection that nature selects the breeding qualities which safeguard the future of the species in other words its the survival of the fittest Leakey Goodall pg 20 To arrive at his theory on evolution and the process of natural selection Darwin set out on the HMS Beagle in 1831 to investigate geological formations of the Galapagos islands Here he observed how the birds and reptiles of each island that the ship visited while resembling those of South America seemed to vary from island to island He also noticed the resemblance of giant fossils such as the giant armadillos to those of the smaller modern day counterparts Darwin also saw how some creatures very similar to each other exhibited different characteristics even in different locations within the same general area From these observations he became more and more convinced
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