Racial beliefs about African physiology served plantation slavery’s economic needs

Evidence

The belief that Africans were naturally capable of working on plantations in the full heat of the sun, were physically stronger than Europeans and intellectually inferior (it was suggested they did not mature beyond the age of a teenage white person), arose primarily because it suited the economic needs of plantation slavery. — David Theo Goldberg, John Solomos, A Companion to Racial and Ethnic Studies, 1859

Categorization

• QUESTION: Worth chasing the primary-source trail: which exact 1840s-50s texts asserted Blacks ‘do not mature beyond the age of a teenage white person’?