Final answer:
David Goldblatt, when discussing his book 'The Age of Football,' is providing a secondary source which synthesizes information from primary and other secondary sources to explore the African American experience and its global cultural impact during the Cold War era.
Step-by-step explanation:
When David Goldblatt discusses his book The Age of Football, the type of source he is providing can be considered a secondary source. In historical research, secondary sources analyze and interpret primary sources, which are direct and firsthand accounts of events. Goldblatt's discussion synthesizes information from a diverse collection of primary sources, such as newspapers and government documents, in addition to existing secondary sources like scholarly journals and books.
This chapter, specifically, explores the postwar African American experience through the lens of cultural diplomacy in sport. In the context of the Cold War, African American athletes, notably prize fighters, played a significant role in shaping perceptions of 'blackness' globally. These athletes' international popularity and the cultural impact of their racial identities on global audiences highlight the importance of cultural diplomacy in sports during this era.