 Notwithstanding the previous caveats, it is a fact that some major twentieth century appeals to the category of style in mathematics have done so in reference to the arts. This is especially true of those authors who were motivated by accounting in a unified way for the cultural production of mankind and who saw thus a uniformity in the processes of scientific and artistic production. It was in such context that Oswald Spengler in The Decline of the West (1919, 1921) attempted a morphology of world history and claimed that the history of mathematics was characterized by different stylistic epochs which depended on the culture that produced it: