A: In the real world, yes, adoption would have been a better course.However, scholars now believe that Abraham was not a historicalperson. The reason for this supposed liaiso…n was to create asubplot about Ishmael and thereby complete the biblical genealogyof all the nations known to the Israelites. The portrayal ofpersonal jealousy between Sarah and Hagar reflected the historicaljealousy between the Hebrews and the Ishmaelites. Answer: Abraham didn't adopt a child because God had promised him that hewould have a son born of his own seed (Genesis ch.15). After manyyears of Sarah remaining barren (Genesis ch.16), the proper courseof action seemed to be to take another wife (which was permitted inthe ancient world, and in Judaism until 1,000 years ago). Note thatnowhere is Sarah blamed for her preference of her own householdover that of Hagar. On the contrary, God corroborated her feelings(Genesis ch.21). The problem of jealousy is one that may occur in any familycontaining siblings and is not an excuse for limiting the size ofthe family. .
Comment (RE: God promised Abraham a son from his own seed) .
In the film, "Another Perfect Stranger", a modern day Jesus ison a plane talking to a young woman who asks him if he has any kidsof his own. Jesus responds, "No. No physical descendants." Theyoung woman responds perplexed, "No physical descendants?" "That'sright", Jesus cleverly replies. Abraham's descendants are like thesands of the seashore or stars in the heavens. But these are notphysical descendants. They are children of the King, Jesus. Thoseof the family of God. (MORE)