Final answer:
In Islamic societies, Muslims could become slaves, but various factors made it challenging to maintain a permanently enslaved population.
Step-by-step explanation:
In Islamic societies, Muslims could become slaves, but there were various factors that made it difficult to maintain a permanently enslaved population. Muhammad encouraged the freeing of enslaved people and many Muslims did so. Enslaved men and women were also allowed to purchase their own freedom. Children of enslaved women and their owners were born free, making it challenging to maintain a self-reproducing enslaved population. However, it should be noted that the practice of enslaving others was not specific to Islamic societies; it occurred in various societies throughout history.