Practice promoted as solution for the abundance of single women, Arab demographic threat and the predicament of seeking extramarital relations.
A new organization is trying to reinstate polygamy into mainstream Orthodox Judaism, despite it being against the contemporary norm of Jewish law, and prohibited by the state.
The idea is the brainchild of Habayit Hayehudi Hashalem (The Complete Jewish Household).
A small advertisement over the weekend in the broadly circulated Shabbat Beshabato, a hand-out distributed in synagogues nationwide dealing with the weekly Torah portion and contemporary issues, quoted a paragraph from senior Sephardi adjudicator Rabbi Ovadia Yosef’s Yabi’a Omer treatise, in which he wrote that it is a mistake for non-Ashkenazim to follow Rabbeinu Gershom’s “stringency,” according to which it is prohibited for a man to marry more than one wife. Approximately 1,000 years ago, Rabbeinu Gershom of Mainz, Germany, issued resonating reforms on a variety of subjects pertaining to Jewish life, and those who transgressed them were liable to be socially excommunicated. Perhaps the most well-known of these prohibitions is to not to be married to more than one woman at a time, despite the fact that this was common in biblical times.
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http://www.jpost.com/JewishWorld/JewishNews/Article.aspx?id=228736