How did views on land affect how slaves were treated in Africa compared to the Americas?

" The slaves in Africa, I suppose, are nearly in the proportion of three to one to the freemen . They claim no reward for their services except food and clothing , and are treated with kindness or severity, according to the good or bad disposition of their masters. Custom, however, has established certain rules with regard to the treatment of slaves, which it is thought dishonourable to violate. Thus the domestic slaves, or such as are born in a man’ s own house , are treated with more lenity than those which are purchased with money. . . . But these restrictions on the power of the master extend not to the care of prisoners taken in war, nor to that of slaves purchased with money. All these unfortunate beings are considered as strangers and foreigners, who have no right to the protection of the law, and may be treated with severity, or sold to a stranger , according to the pleasure of their owners. "

Travels in the Interior of Africa , Mungo Park, Travels in the Interior of Africa v. II , Chapter XXII – War and Slavery

Explanation:

it was seen as enticement to accept british domination.

why was the national assembly formed by the third estate?

the estates-general had not been assembled since 1614, and its deputies drew up long lists of grievances and called for sweeping political and social reforms. the third estate, which had the most representatives, declared itself the national assembly and took an oath to force a new constitution on the king.