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>A Nazi-era school textbook for German students entitled Heredity and Racial Biology for Students written by Jakob Graf described in a section titled "The Aryan: The Creative Force in Human History".[156] Graf claimed that the original Aryans developed from Nordic peoples who invaded ancient India and launched the initial development of Aryan culture there that later spread to ancient Persia and he claimed that the Aryan presence in Persia was what was responsible for its development into an empire.[156] He claimed that ancient Greek culture was developed by Nordic peoples due to paintings of the time which showed Greeks who were tall, light-skinned, light-eyed, blond-haired people.[156] He said that the Roman Empire was developed by the Italics who were related to the Celts who were also a Nordic people.[156] He believed that the vanishing of the Nordic component of the populations in Greece and Rome led to their downfall.[156]
>The Renaissance was claimed to have developed in the Western Roman Empire because of the Germanic invasions that brought new Nordic blood to the Empire's lands, such as the presence of Nordic blood in the Lombards (referred to as Longobards in the book); that remnants of the western Goths were responsible for the creation of the Spanish Empire; and that the heritage of the Franks, Goths and Germanic peoples in France was what was responsible for its rise as a major power.[156] He claimed that the rise of the Russian Empire was due to its leadership by people of Norman descent.[156] He described the rise of Anglo-Saxon societies in North America, South Africa and Australia as being the result of the Nordic heritage of Anglo-Saxons.[156] He concluded these points by saying: "Everywhere Nordic creative power has built mighty empires with high-minded ideas, and to this very day Aryan languages and cultural values are spread over a large part of the world, though the creative Nordic blood has long since vanished in many places".[156]