A fundamental study of the political history of the Islamic world by the German historian and orientalist August Müller (1848-1892) is presented to your attention. The essay gives a clear, coherent and meaningful general overview of the predominantly external history of the Muslim world. In many private issues, the author expressed an independent, weighty point of view based on proven sources of predecessors. Since the end of the 19th century, the work has enjoyed extraordinary popularity among contemporaries, interest in it continues unabated at the present time.