III. The World as Illusion

Spencer was motivated in his thought by the need for a naturalistic explanation of spiritual phenomena. He found the general direction for such an explanation in Lyell's geology (compare in Part 2 Chapter I). In this geology, to be sure, the idea is still rejected that organic forms have gradually developed one from another. It nevertheless receives a powerful support through the fact that the inorganic (geological) formations of the earth's surface are explained through such a gradual development and through violent catastrophes. Spencer, who had a natural scientific education and who had for a time also been active as a civil engineer, recognized at once the full extent of the idea of evolution, and he applied it in spite of Lyell's opposition to it. He even applied this idea to spiritual processes. As early as 1850, in his book, Social Statistics, he described social evolution in analogy with organic evolution. He also acquainted himself with the studies of Harvey and Wolff in embryonic development (compare Part I, Chapter IX of this book), and he plunged into the works of Karl Ernst von Baer (compare above in Part II Chapter II), which showed him that evolution proceeded from the development of a homogeneous uniform state to one of variety, diversity and abundance. In the early stages of embryological development the organisms are very similar; later they become different from one another (compare above in Part II Chapter II). Through Darwin this evolutionary thought was completely confirmed. From a few original organic forms the whole wealth of the highly diversified world of formations has developed.