I have formed a brief explanation of what your answer should consist of.
Answer: The casket might remind us of the 'three chests of gold, silver, and lead' in The Merchant of Venice, which form part of the 'lott'ry' devised by Portia's father before his death, to dictate whom she should marry
it became more prominent because the black power movement technically started the peaceful civil rights movement. Americans noticed that it wasn’t just the African Americans that needed independence, but other ethnicities (bringing peace to all)
