H. G. Wells,
The Outline of History: Being a Plain History of Life and Mankind
“ And while we are enumerating the forces that change climate and the conditions of terrestrial life, we may perhaps look ahead a little and add a fourth set of influences, at first unimportant in the history of the world so far as the land surface is concerned,{v1-37} but becoming more important after the age of Reptiles, to which we shall proceed in our next chapter. ”
