Why did African merchants and rulers participated in the slave trade

Why did African merchants and rulers participated in the slave trade?

Because Instead, European traders generally relied on a network of African rulers and traders to capture and bring enslaved Africans from various coastal and interior regions to slave castles on the West and Central African coast. Many of these traders acquired captives as a result of military and political conflict, but some also pursued slave trading for profit.

in his book, the riddle of the rosetta stone, james giblin talks about how there was a young british polymath and physician named thomas young who made a lot of advances on the deciphering of the rosetta stone. he says that even though young made a lot of mistakes because he was working under false assumptions, he also made huge contributions like deciphering three out of the seven symbols (more than anyone else before him). young published his findings and continued his good work but he wasn't able to progress much further due to some unfavorable situations, he still laid the basis for many other scholars and of course for the man who has been generally known to have deciphered it, jean-françois champollion

he government should regulate the economy