Polygamy was only allowed as a 'necessary evil' in times past because certain conditions existed. For instance, in times of war where many man may have been killed, producing a surplus of women, it became necessary. Also, in many cultures where property or rights were extended through male lineage rather than law, it was necessary to protect those rights through the allowance of polygamy. However, in our world today these 'supply and demand' and 'property' issues are not a concern, therefore the reasons for polygamy no longer exist. Those who practice polygamy today do so either by choice based on available wealth, or by coercion through tightly-controlled communities who create false 'supply and demand' scenarios (example: FLDS communities forcing younger men out of their communities).