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Analyses of large human concentrations in big cities , in multidisciplinary studies by Ronald Daus , show how new methods may be applied to the understanding of man living in a global world and how it was caused by the action of extra-European nations , so highlighting the role of Ethics in modern anthropology .
 Ronald Daus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ronald Daus