近几十年国内外家庭史研究的发展和有关资料、论著的发展,给我们提供了进一步研究家庭史的条件。我们在研究中发现,对偶婚从夫居形态在原始社会后期(相当于美国民族学家摩尔根分期的野蛮时代中级和高级阶段),在世界各民族广泛存在过,是由对偶婚从妻居向一夫一妻制发展过程一个必经的基本阶段。摩尔根在《古代社会》 The development of family history research at home and abroad in recent decades and the development of related materials and works have provided us with the conditions for further study of family history. In our study, we found that the form of dual marriage is widely existed in all ethnic groups in the world during the later primitive society (equivalent to the middle and high stage of barbarism of the American ethnographer Morgan staging) A fundamental stage necessary for the development of monogamy. Morgan in the “ancient society”