Answer:
Slavery was common in both the 1 st century B.C.E and the 15th century C.E, the diffrence is that it was less common in Europe in the 15th century, but was developing in other parts of the world.
Explanation:
In the 1st century B.C.E, Europe was dominated by the Roman Republic, whose economic system was based on enslaved labor. This is one of the reasons that pushed the Roman Republic to start so many wars and conquer so many territories: in order to obtain slaves form the conquered populations.
By the 15th century C.E, slavery had almost disappeared in Europe because christianity forbade the enslavement of other christians. However, Europeans began to expand slavery using the African population, who they deemed inferior even if they converted to christianity. By the end of this century, the Portuguese strated the Atlantic Slave Trade by taking slaves from Angola and the Gulf of Guinea to Brazil.
