function ". ▁On ▁a ▁bi op ower - level , ▁the ▁usage ▁of ▁contra cept ives ▁has ▁been ▁studied , ▁some ▁social ▁groups ▁have ▁( by ▁various ▁means ) ▁been ▁encourag ed ▁to ▁have ▁children , ▁while ▁others ▁( such ▁as ▁poor , ▁sick , ▁un mar ried ▁women , ▁crim inals ▁or ▁people ▁with ▁dis ability ) ▁have ▁been ▁disc ou rag ed ▁or ▁prevent ed ▁from ▁having ▁children . ▁ ▁In ▁the ▁era ▁of ▁bi op ower , ▁death ▁has ▁become ▁a ▁sc andal ▁and ▁a ▁cat ast rop he , ▁but ▁despite ▁this ▁bi op ower ▁has ▁according ▁to ▁Fou ca ult ▁killed ▁more ▁people ▁than ▁any ▁other ▁form ▁of ▁power ▁has ▁ever ▁done ▁before ▁it . ▁Under ▁so ver eign ▁power , ▁the ▁so ver eign ▁king ▁could ▁kill ▁people ▁to ▁ex ert ▁his ▁power ▁or ▁start ▁wars ▁simply ▁to ▁extend ▁his ▁kingdom , ▁but ▁during ▁the ▁era ▁of ▁bi op ower ▁wars ▁have ▁instead ▁been ▁motiv ated ▁by ▁an ▁amb ition ▁to ▁" prote ct ▁life ▁itself ". ▁Similar ▁motiv ations ▁has ▁also ▁been ▁used ▁for ▁gen o cide . ▁For ▁example , ▁Naz i ▁Germany ▁motiv ated ▁its ▁attempt ▁to ▁er ad icate ▁Jews , ▁the ▁ment ally ▁ill ▁and ▁disabled ▁with ▁the ▁motiv ation ▁that ▁Jews ▁were ▁" a ▁threat ▁to ▁the ▁German ▁health ", ▁and ▁that ▁the ▁money ▁spent ▁on ▁health care ▁for ▁ment ally ▁ill ▁and ▁disabled ▁would ▁be ▁better ▁spent ▁on ▁" vi able ▁Germ ans ". ▁Ch lo ë ▁Taylor ▁also ▁mentions