Why was slavery existed in so many cultures across time

Slavery in ancient times typically came about as a result of debt, birth into a slave family, child abandonment, war, or as a punishment for crime. At the outset, the slave trade wasn’t very popular and was certainly not a booming global business. Rather, slavers would often seek out a buyer who could use the specific skills of a slave, matching supply with demand on a local and personal level. According to historical texts, the lives of slaves in ancient times were typically better than that of peasants in the same era, as they had regular care, food, shelter and clothing. Slaves rarely attempted to run away unless their masters were atypically cruel.

d.) continue to rise rapidly

what terms are there?