Sentence:  This short sketch of the changes that take place among those races that are only the depositories of a culture also furnishes a picture of the development and the activity and the disappearance of those who are the true founders of culture on this earth, namely the <WSD>Aryans</WSD> themselves. 
Meaning of the word marked with <WSD> tags:  A member of an alleged master race with no fixed definition, comprising people of Germanic descent (in the narrowest sense), or all non-Jewish Caucasians (in the broadest sense)