Principles of Evolution - 4Lamarck's ContributionsAbout this same time, Lamarck proposed that all organisms had been created in asimple state and were improved by gradual changes into more complex structures.He was much taken by the gradual changes shown in many organisms in the fossilrecords. The motivation for the improvement, according to Lamarck, was aninnate "drive for perfection". The need to have a better structure resulted insome body force directed to fulfilling that need which was then passed on to one'soffspring. Lamarck was the first to propose that one's environment wasimportant to survival, although he erred in proposing how changes occurred, andwere subsequently passed on from one generation to the next. (But he alsopreceded Mendel). Lamarck's work has often been called evolution through theinheritance of acquired characteristics, but that is not exactly what he did.Lamarck's View of Change Post-Darwin's View of ChangeThomas Malthus
This is the end of the preview.
access the rest of the document.