Human: How did the theory of the Origin of Species Activity come about? Assistant: 
Charles Darwin was the first to propose the theory of evolution by natural selection. He did so in his book On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life. Darwin proposed that the species of life on Earth evolved through natural selection, or the preservation of favoured races in the struggle for life. Darwin’s theory was controversial at the time, but has since been proven true.