Brazilian slave-trade nationalization reorganized ethnic slave disposition patterns

Evidence

By the 1820s, Bahian and other Brazilian factors had become the dominant agents in the newly independent nation’s slave trade. Now, with direct control of the slave market in the hands of collaborators close to the planters, it would be expected that the disposition of Africans would more faithfully adhere to the rules implied by the society’s code of slave control: “Minas” to the urban areas, “Angolas” to the mills and their associated plantations. For the most part and for some time that is how it went. Inevitably, however, new exigencies compelled adaptation. This break, one historian surmises, was important both to the construction of the slave rebellions that followed as well as to their subsequent reconstruction. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 761

Categorization

• QUESTION: The ‘break’ in disposition that fed the rebellions is hinted at but never spelled out — which new exigencies and how did the deviation help construct the rebellions?