There is a wealth of information on the internet regarding translation and definition of the word, "Slave", as used in the Bible, giving background and context, if anyone cares to have a look. I was going to post extracts and links but there are so many of them I leave it up to fellow posters to decide if they are sufficiently interested.
Another word is "Eternal", as it is applied to God, but I don't think the definitions given would answer the questions posed here.
I've just seen a couple of recent posts. There is slavery here in the UK, even though it is illegal. Young people 'shipped' here with the promise of work and made to work as prostitutes, badly treated if they object, closely guarded. Children brought to the UK from other countries to be servants to relatively well off people, again not well looked after, not allowed to go to school or go out and often cruelly punished for the slightest thing. These practices, and others, are outlawed but they happen.
Link between churches and crime in cities is that they are often in deprived areas where criminal activity is high anyway. That's why most churches are locked up like Fort Knox most of the time but there are still break-ins and things stolen.