The music referred to as jazz (a term which arguably has its origins in the amalgamated African cultures of Georgia and South Carolina, a.k.a. Gullah) is not dead. It continues to live and grow, and thus cannot be dealt with as a fixed relic.
The heritage of jazz is filled with African-derived sensibilities that often challenge the expectations of genre categorization. Anthropologists have begun to regard the histories of slaves who were once invisible; the discovery of the African American burial grounds in New York has opened a floodgate of questions about the quality of life of Africans in early America.