I meant the literal definition of Muslim, not just Islam.

And what is that supposed to be?
The English definition is a follower of Islam 1, 2, 3, 4, 5

If you take the translation from Arabic "someone in submission to the will and law of God” then I don’t see how that would not apply to religious Jews as well.

So it would really help your argument if you could provide a source that shows any significant meaning of Muslim outside the context of Islam.

Tat used to be not so uncommon under capitalism as well.
The big, old fashioned manufacturing companies often had livelong employees.

I’d say inheritable professions are more pre industrial revolution than Soviet.