Charles Darwin was a Enlgish naturalist, that was the one who established a theory that states that all species of life had descended overtime because of there common ancestors that is called the national selection, also proposed to make it a scientific theory. He passed the mostly of time of his life trying to prove his theory and start coming crazy. Darwin start arriving to his theory by start observing other species of animal of how they react in some occations. He had some issues of making popular his theory because he didn´t knew if she agree with him because of her beliefs; but after she tells him to publish it an he does it. He had a lot of anguish between his theory because of all the stress of working on it, and then a person sends him a letter that his developing the same theory , so Darwin was nervious because he start thinking all what will happen if that person publish the theory first them him and his work was going to be for nothing. Other anguishment of him was the health of his daughters and sons.
Bibliography: http://en.wikipedia.org/wiki/Charles_Darwin#Social_Darwinism
