The lists of enslaved captives for ransom and freed during the reign of John V of Portugal reveal that even Brazilians were captured and sold in African markets.
The subsequent lack of a forced and free manpower for colonial exploitation meant that colonists began looking for ways to introduce labor from other sources.
As for the Dutch, from 1630, they began to occupy the sugar producing regions in Brazil, and to address the lack of slave labor, in 1638 embarked on the conquest of Portuguese warehouse of São Jorge da Mina, and 1641, organized the take over of Luanda and Benguela in Angola.
[8] As for African governments, whether they were of religious Muslim[9] or other native religions, as practiced slavery long before the Europeans engage in trafficking.
Then, by Charter of March 29, 1559, Mrs. Catherine of Austria, regent of Portugal, authorized each plantation owner of Brazil, with a statement by the Governor General, to import up to 120 slaves.
[13] During the crossing, the mortality rate, although lower than on land, until the late eighteenth century remained daunting, with greater or lesser effect depending on the epidemics of riots and suicides carried out by the enslaved, the conditions prevailing on board, as well as the mood of the captain and crew of each slave ship.
However, Brazil largely failed to enforce this treaty; in response, the Parliament of the United Kingdom passed the Aberdeen Act of 1845, authorizing British warships to board all Brazilian flagged vessels and detain those found to be carrying slaves.
[20][18] Historians, such as Benedita Pinto and Flávio Gomes, interpret the organisation of the group as an ideal model of resistance to slavery.