I know this is a strange question, but it is hard to understand. Why was there so much polygamy in the OT? Back then it'd be pretty hard to be forgiven for your sins (No Jesus), so why were all of God's chosen sinful in regards to marriage? I know David was punished for the death of Uriah, but then he was blessed through Bathsheeba by having Solomon. I just don't get it. It seems like God made all the nations and Israel (And Jesus) through these polygamous relationships, why?