Answer:
benvolio noticed that Romeo purposely hid from him
What is bred in the bone will not wear out of the flesh
...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.