to construe a Darwinian theory of mankind. Since it was thought at the time that the orangutan and human brain were roughly the same size, Darwin and his colleagues suspected that only the invention of language could account for differentiation between humans and other Great Apes. It was suggested that the evolution of language and the mind must go hand in hand. From this perspective, empirical evidence from languages from around the world was interpreted by Haeckel as supporting the idea that nations, despite having rather similar physiology, represented such distinct lines of 'evolution' that mankind should be divided into nine different species. Haeckel constructed an evolutionary and intellectual hierarchy of such species. In a similar vein, Schleicher regarded languages as different species and sub-species, adopting Darwin's concept of selection through competition to the study of the history and spread of nations. Some of their ideas, including the concept of living space were adopted to the Nazi ideology after their deaths. Social evolution theories in Germany gained large popularity in the 1860s and had a strong antiestablishment connotation first. Social Darwinism allowed people to counter the connection of Thron und Altar, the intertwined establishment of clergy and nobility, and provided as well the idea of progressive change and evolution of society as a whole. Ernst Haeckel propagated both Darwinism as a part of natural history and as a suitable base for a modern Weltanschauung, a world view based on scientific reasoning in his Monist League. Friedrich von Hellwald had a strong role in popularizing it in Austria. Darwin's work served as a catalyst to popularize evolutionary thinking. A sort of aristocratic turn, the use of the struggle for life as a base of social Darwinism sensu stricto came up after 1900 with Alexander Tille's 1895 work Entwicklungsethik (Ethics of Evolution), which asked to move from Darwin till Nietzsche. Further interpretations moved to ideologies propagating a racist and hierarchical society and provided ground for the later radical versions of social Darwinism. Social Darwinism came to play a major role in the ideology of Nazism, which combined it with a similarly pseudo-scientific theory of racial hierarchy to identify the Germans as a part of what the Nazis regarded as an Aryan or Nordic master race. Nazi social Darwinist beliefs led them to retain business competition and private property as economic engines. Nazism likewise opposed social welfare based on a social Darwinist belief