How can the heirs rectify what their fathers and grandfathers corrupted regarding the deprivation of women from inheritance, and is it permissible for the current heirs to take what they have received from this inheritance?

Oppressing females in inheritance is a grave sin and an act of ignorance (Jahiliyyah). A Muslim must return rights to their rightful owners, as financial rights do not expire with the passage of time. Even if the injustice was committed by ancestors, it does not absolve the descendants of responsibility. You must convince your brothers to rectify the unfair division. If they refuse, then you must only take your lawful share of the inheritance and return the rest to its rightful owners. It is advisable to seek assistance from inheritance division offices or scholars to divide the inheritance correctly.