I’d say común and popular
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The purpose is usually to analyze the meaning of the play and understand the themes and messages contained within the characters of the play and the play itself.
...To recognize the commonalities in all human goals, and how those goals combine to maintain a functioning society.
King reminds the audience that everyone plays a role in society; casting people away creates tension and pushes us away from progress. It's a flaw that distracts us from order... and creates anger and greed as a by-product.