The Commerce Clause<span> describes an enumerated </span>power<span> listed in the United </span>States Constitution<span> (Article I, Section 8, Clause 3). The clause </span>states<span> that the United </span>States<span> Congress shall have </span>power "To regulate<span> Commerce with foreign Nations, and </span>among<span> the several </span>States<span>, and with the Indian Tribes."</span>
Answer:
White people in america didn´t see them as humans, so that allowed them to use them as slaves. This view of them being non-human allowed them to use them as tools and sell them like animals.
The answer is : The crusades.
The Crusades were a series of religious wars between Christians and Muslims started primarily to secure control of holy sites considered sacred by both groups. In all, eight major Crusade expeditions — varying in size, strength and degree of success — occurred between 1096 and 1291.