Basically, there were 3 divisions, but they were not hard-and-fast, (as in a Caste System), people could move between them, but also belong to more than one simultaneously; it was also dependent to a great deal on your social class, wealth, whether you lived in rural or urban society or circles, and especially whether you were a Christian or not: this introduced big changes:- -prostitutes/concubines, -slaves, and -"cow" (a.k.a. mothers / provider of children [sons preferred] ) This last area will doubtless get some angry, but it is true - you must be realistic: it was exactly the same then as it was with the aristocracy in England , where it was common for men to marry someone of their own class (for their money, property, status, position, or whatever) but to have someone else to be the a