Answer:
Natural slaves are those who don't think .
Explanation:
According to Aristotle, some people are "natural slaves" because they are the property of their master and obey their master in every aspects of their society. Some people are slaves by nature while some are the slaves of the law. The natural slaves are those who have no their own point of view, they only do what their master say to do. These peoples are slaves by soul and there is no other way just to obey their master. Slavery was "beneficial and just" for them because they think that this is an easier life than fighting for their rights.
The main advantage which the Germanic tribes had in their conflict against the Roman Empire at the time during the 3rdr and 5th century was that they were very motivated to defend their own lands which were invaded by the Romans. They also knew the terrain and felt comfortable being there.
Explanation:
Slaves are those people who are bound by the authority of someone and are meant to serve that authority
The continual flow of the free market is driven by self interest and competition.