Why Weren’t the Israelites Explicitly Forbidden to Practice Polygamy?

Questions about how to reconcile the biblical model of marriage with polygamy in the Old Testament, why the Israelites weren’t explicitly forbidden to practice polygamy, and how we can gain wisdom from Solomon about marriage when he had 700 wives and 300 concubines.

• How can we reconcile the biblical model of marriage (one man, one woman, one flesh, one lifetime) with the deviations from this model in the Old Testament, especially involving polygamy?
• What are your thoughts on why the Israelites were not explicitly forbidden to practice polygamy?
• How is it that we gain so much knowledge and wisdom from Solomon regarding marriage and relationships when he had 700 wives and 300 concubines?