Although this can only be a positive in a society where women are not allowed self sufficiency and must rely on a man to provide (strong patriarchy), thus practice of Levirate marriage is strongly associated with patriarchal societies.
Although this can only be a positive in a society where women are not allowed self sufficiency and must rely on a man to provide, especially in societies where women are seen as under the authority, dependence, servitude, and/or possession of their husband. Thus practice of Levirate marriage is strongly associated with patriarchal societies.