woman will acquire one husband after another in sequence. This form is flexible. These men may or may not be related. And it may or may not incorporate a hierarchical system, where one husband is considered primary and may be allotted certain rights or privileges not awarded to secondary husbands, such as biologically fathering a child. In cases where one husband has a primary role, the secondary husbands have the power to succeed the primary if he were to become severely ill or be away from the home for a long period of time or is otherwise rendered incapable of fulfilling his husbandly duties. Successional polyandry can likewise be egalitarian, where all husbands are equal in status and receive the same rights and privileges. In this system, each husband will have a wedding ceremony and share the paternity of whatever children she may bear. Associated polyandry Another form of polyandry is a combination of polyandry and polygyny; whereas women are married to several men simultaneously and the same men may marry other women. It is found in some tribes of native Africa as well as villages in northern Nigeria and the northern Cameroons. Usually, one of the woman's husbands will be chosen to be the husband of a woman from another tribe who would also have many husbands; this double-polyandrous union serves to form a marital alliance between tribes. Other Classifications: Equal polygamy, Polygynandry The system results in less land fragmentation, and a diversification of domestic activities. Fraternal polyandry Fraternal polyandry (from the Latin frater—brother), also called adelphic polyandry (from the Greek —brother), is a form of polyandry in which a woman is married to two or more men who are brothers. Fraternal polyandry was (and sometimes still is) found in certain areas of Tibet, Nepal, and Northern India, as well as some central African cultures where polyandry was accepted as a social practice. The Toda people of southern India practice fraternal polyandry, but monogamy has become prevalent recently. In contemporary Hindu society, polyandrous marriages in agrarian societies in the Malwa region of Punjab seem to occur to avoid division of farming land. Fraternal polyandry achieves a similar goal to that of primogeniture in 19th-century England. Primogeniture dictated that the eldest son inherited the family estate, while younger sons had to leave home and seek their own employment. Primogeniture maintained family estates intact over generations by permitting only one heir