Polygyny

Popular legend tells us that Rabbenu Gershom (d. ca 1028) was the first to prohibit polygyny. The Damascus Covenant’s understanding of the law in Leviticus 18:18, however, suggests that polygyny may have been prohibited more than a thousand years earlier by the Priestly authors.

Deuteronomy commands a man to marry the childless widow of his brother (yibbum). And yet, a close look at the Priestly text of the Torah shows that it did not have the option of yibbum.