Evolutionary Theory By emmyxmas Period: 304 to Dec 31, 1913 Years Sep 20, 1707 Developed a hierarchical classifications and scheme and binomial normenclature Sep 20, 1726 Changes in earths crust due to slow continuouis processes Sep 20, 1744 Law of use and disuse Sep 20, 1766 Struggle for Existance Sep 20, 1769 Catastrophism Sep 20, 1797 Principles of Geology Sep 20, 1809 Natural Selection Sep 20, 1823 Common Ancestors Sep 20, 1859 Origin of Species Mar 2, 2022 Species are permanent perfect immutable. Species are permanent perfect immutable.