ABSTRACT
This chapter proposes the Darwin’s account of three subjects, all intimately connected, single, and multiple centres of creation, means of dispersal, and the great Ice-Age. To drag in the ice-age seems almost unnecessary, for even if one concedes the point, that a single centre, and not multiple centres of creation, is the true explanation, there are other methods than the ice-age. Well, most geologists and men of science, have long ago agreed, that these phenomena could only be accounted for, by a great Ice-age called the glacial period. All geologists, botanists, and naturalists, are fond of the Ice-age. Whenever they experience anything unaccountable, then the Ice-age must have done it. Physical conditions according to Darwin are not sufficient to account for dissimilarities, but natural selection, that is a power to preserve a change that has already been effected, is. Darwin assumes that climate and physical agencies, are insufficient for the work.
