“Slave” is a very archaic word in this context. It is my understanding he is talking about the concept of prisoners.
It says that he is considered a wild beast with no rights and can be subject to ‘despotic power’. That sounds more like a slave than a prisoner. If he just meant prisoner, it would also mean that he opposes people being imprisoned in any context outside of war.
This is not the economic practice of slave labor being described.
It certainly says slave labor is an acceptable use of these prisoners. Which makes sense given that the person saying it owned part of slaving company.
It says that he is considered a wild beast with no rights and can be subject to ‘despotic power’. That sounds more like a slave than a prisoner. If he just meant prisoner, it would also mean that he opposes people being imprisoned in any context outside of war.
It certainly says slave labor is an acceptable use of these prisoners. Which makes sense given that the person saying it owned part of slaving company.