'Can we doubt ... that individuals having any advantage, however slight, over others, would have the best chance of surviving and of procreating their kind?'

In The Origin of Species (1859) Darwin challenged many of the most deeply held beliefs of the Western world. His insistence on the immense length of the past and on the abundance of life-forms, present and extinct, dislodged man from his central position in creation and called into question the role of the Creator. He showed that new species are achieved by natural selection, and that absence of plan is an inherent part of the evolutionary process. The present edition provides a detailed and accessible discussion of his theories and adds an account of the immediate responses to the book on publication.

• Charles Darwin revolutionized our ideas about the natural world and our place in it by introducing the concepts of natural selection and survival of the fittest, and his ideas still provoke controversy today.
• Editor Gillian Beer has writtten extensively about Darwin and about scientific writing in its cultural context. Her wide-ranging introduction considers the development of Darwin's ideas, the scientific context, the nature of his theories and the impact of his work on his contemporaries.
• Includes a Register of Writers referred to in the text of the Origin, a Glossary of Scientific Terms and an Index.