What are the negative impacts on slavery?

Slavery came about when the slave trade did. The negative impacts on slavery coming from the slave trade resulted in a demographic disaster due to the large amount of African males being removed in the continent. Slavery was also caused destruction of cultural diversity during the time.

the language dates from the contacts of arabian traders with the inhabitants of the east coast of africa over many centuries. under arab influence, swahili originated as a lingua franca used by several closely related bantu-speaking tribal groups.

this is a good question! i'll do some research and come back when i have the answer!