A Polish historian Feliks Koneczny (1862-1949) wrote three books on the theory of civilizations: On the Plurality of Civilizations (London 1962), For an Order in History, (only Polish edition, London 1977), and History Laws (only Polish edition, London 1982). He was an empirical theoretician who discovered (in contrast to Spengler’s a priori model) that there is no one linear history of Mankind.