62995
This view is represented , inter alia , by anthropologist Lewis H. Morgan in Ancient Society and quoted by Friedrich Engels ' work The Origin of the Family , Private Property and the State .
 Lewis H. Morgan, Friedrich Engels
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lewis H. Morgan, Friedrich Engels