Sentence:  To derive Utopian communism from the Jerusalem Christian community of the apostolic age or from its medieval successors in spirit , the <WSD>monastic</WSD> communities , is with an appropriate shift of adjectives , misleading in the same way as to derive it from Plato 's Republic : 
Meaning of the word marked with <WSD> tags:  of communal life sequestered from the world under religious vows