To be a slave means that you must do what your master tells you, even if if horrifies or disgusts you or you feel it is wrong: you are a slave, you have no choice. To remove the option of refusal, in slavery, is what makes it wrong, as it reduced the human being to the level of an animal - less than that, even, to the level of an object.
Bold: To highlight the portion I find hard to understand.
While I agree with most of what you said there; I disagree with the idea that any person can EVER be made to do something involuntarily. Even if the consequence of disobedience is immediate death, the option to dissent remains... always. The ONLY person that can enslave you, is you, by allowing another person to dictate your actions. If one allows themselves to become subjugated it is THEY that is making the decision to comply. Resistance is always an option. To me, it seems axiomatic. You might allow your fears to override your desire for freedom, but that doesn't change the fact that you CAN resist, always.
Oh, agreed - I was rushing the answer a bit. I initially thought "I'm sure that will be a great comfort to anyone currently enslaved - it's THEIR fault, not their captors", but that doesn't really answer your point.
What I was endeavouring to say is that the difference between being a slave, and not, is that if I do not wish to carry out the instructions given me, is whether I have the legal or accepted right to refuse - and what the accepted or legal consequences will be.
At work, if my boss says "do that", then I can indeed refuse. He may sack me, but if refusal is what I choose, then there is nothing that can stop me from walking out. With slavery, if I refuse, I AM prevented from walking away. As a slave (assuming a socity that accepts slavery), if I try to run away, and get caught, the authorities will bring me back to my owner. If my owner chooses to restrain me, he can.
Less dramatically, my owner will have the right to decide what I wear. When I eat. Who I may speak to. When and wear I sleep. What I may read, or watch, or do.
Sorry, struggling to make my point here, but I think that's what it comes down to. The ability to make one's own decisions, and to have the freedom to carry them out.
There is a significant amount of overlap with lots of jobs, I agree! My employer restricts what I can wear and when I can eat. But if I stand up and say "I quit", and walk out, then there is nothing he can do to retain me. As a slave, I cannot quit. That's the point.