<Li> Principles of Geology 1st edition, 1st vol . Jan. 1830 (John Murray, London). </Li> <Li> Principles of Geology 1st edition, 2nd vol . Jan. 1832 </Li> <Li> Principles of Geology 1st edition, 3rd vol . May 1833 </Li> <Li> Principles of Geology 2nd edition, 1st vol. 1832 </Li>

Who was the first to attempt to explain the mechanism by which species change