Final answer:
Brewster claims that Tulsa was a hotbed of African American prosperity, particularly due to the thriving Greenwood district and its connections to the oil-discovered economy.
Step-by-step explanation:
Brewster claims Tulsa to be a hotbed of African American prosperity. The development of the Greenwood district, which was part of Tulsa, became notable at the turn of the century due to the self-sufficiency that had roots in the All Black Town Movement.
Individuals like Edward McCabe and James Milton Turner were significant figures in this movement, leading to the eventual thriving of some Blacks on a service economy, particularly after the discovery of oil surrounding Tulsa. This discovery and connection to other sectors of Tulsa's economy provided Greenwood with both prominence and stability, drastically differing it from other Black towns that were established on agriculture.