Chaucer describes different characters focusing on the positives and negatives of the people in an entertaining way. The different states included in the tales are England's clergy, the nobility and merchants.
It shows bad examples like the abuses of the clergy with the reference of the nun and the way she dresses.
A good example could be the Plowman's case. A worker that according to the author lives in pace and is a man of God. He respects the Lord and likes charity helping the poor.