▁conc ub in age . ▁ ▁House hold ▁organization ▁Mar riage ▁is ▁the ▁moment ▁at ▁which ▁a ▁new ▁household ▁is ▁formed , ▁but ▁different ▁arrang ements ▁may ▁occur ▁depending ▁upon ▁the ▁type ▁of ▁marriage ▁and ▁some ▁pol yg am ous ▁mar ri ages ▁do ▁not ▁result ▁in ▁the ▁formation ▁of ▁a ▁single ▁household . ▁In ▁many ▁pol yg yn ous ▁mar ri ages ▁the ▁husband ' s ▁w ives ▁may ▁live ▁in ▁separate ▁households ▁ ▁They ▁can ▁thus ▁be ▁described ▁as ▁a ▁" series ▁of ▁linked ▁nuclear ▁families ▁with ▁a ▁' father ' ▁in ▁common ". ▁ ▁Poly and ry ▁ ▁Inc idence ▁ ▁Poly and ry , ▁the ▁practice ▁of ▁a ▁woman ▁having ▁more ▁than ▁one ▁husband ▁at ▁the ▁one ▁time , ▁is ▁much ▁less ▁pre val ent ▁than ▁pol yg yn y ▁and ▁is ▁now ▁illegal ▁in ▁virt ually ▁every ▁country ▁in ▁the ▁world . ▁It ▁takes ▁place ▁only ▁in ▁remote ▁communities . ▁ ▁Poly and ry ▁is ▁believed ▁to ▁be ▁more ▁common ▁in ▁soci eties ▁with ▁scar ce ▁environmental ▁resources , ▁as ▁it ▁is ▁believed ▁to ▁limit ▁human ▁population ▁growth ▁and ▁enh ance ▁child ▁surv ival . ▁It ▁is ▁a ▁rare ▁form ▁of ▁marriage ▁that ▁exists ▁not ▁only ▁among ▁poor ▁families , ▁but ▁also ▁the ▁el ite . ▁For ▁example , ▁in ▁the ▁H imal ay an ▁Mountains ▁poly and ry ▁is ▁related ▁to ▁the ▁scarc ity ▁of ▁land ; ▁the ▁marriage ▁of ▁all ▁brothers ▁in ▁a ▁family ▁to ▁the ▁same ▁wife ▁allows ▁family ▁land ▁to ▁remain ▁int act ▁and