by jimwalton » Wed May 06, 2020 2:07 pm
In the ancient Near East (ANE), having children was of primary importance for the sake of survival, but it was also a cultural value to carry on the family name, including keeping the land and property in the family. Having an heir was critical, and not being able to bear children was one of the highest shames.
It was culturally acceptable and widely sanctioned in the ANE to use a slave as a surrogate. Some Hurrian marriage contracts specified that a wife, if barren, must take steps to furnish a son by these means (also in the Code of Hammurabi). It was not only customary, but sometimes contractually dictated. While Abraham was monogamous, concubinage was not considered as polygamy. Any children by a concubine would by law be considered as belonging to the mistress.
John Walton writes, "In the ancient world marriages represented alliances between clans. They were arranged by parents and were intended to propagate the race and the family. Bearing children was a central part of the equation. If a woman proved unable to bear children, she could be dismissed with no questions asked. Her status in the family was dependent on bearing children. Marriage contracts therefore sought to protect a wife who could not bear children, and one way to do that was to stipulate the identification of the surrogate. This is exactly what Sarah was doing when she identified Hagar as someone who could bear a child in her stead. This was culturally acceptable and sometimes mandated by contract."
You asked a lot of questions. If this summary doesn't answer them all, please ask again, or ask further. I'm willing to talk more.