Why do girls have low self esteem?

Girls have low self esteem,because they feel themselves dependent upon men in some way.They think that men are superior to them.further married women consider their husband as "THE HEAD",or"KING OF THE FAMILY".our older generation have really pushed women to retain this mentality .Although it is so ,there are some women who overcame their low self esteem and identified themselves as an "ESTEEMED VESSEL" before men.They are the existing source of hope and role model for the "under esteemed"