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In general , the theory of representative government is , Gaddafi argues , an outdated practice that was invented by philosophers and thinkers at the time when the common folk were ordered about like livestock by their rulers .
 Gaddafi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gaddafi