Slave

A slave is a person forced to work against their will for no compensation. The act of slavery has been a part of nearly every single civilization at some point though is now outlawed in most societies.

History
The Kree bred trolls to be slaves. Silver Surfer found a group of them on Morovus and helped to free them.

Genosha lured mutants to the island with the promise of peace and instead forced them into slave labor. The X-Men, with help from Cable, led a rebellion against them and freed the slaves.