25. The "joint family" is normally a transition form from "patriarchal family". At the death of common ancestors or head of house, if the family chooses to continue united, the eldest son would be the natural head. The former one was head of family by natural authority, the later other can only be so by a delegated authority. He is primus but inter pares. An undivided Hindu family thus is ordinarily joint, not only in estate but in food and worship. The presumption, therefore, is that members of a Hindu family are living in a state of union unless contrary is established. This presumption however varies inasmuch as it is stronger in case of real brother than in case of cousin and farther one go, from the founder of family, the presumption becomes weaker and weaker. However, there is no presumption that a family, because it is joint, possesses joint property. Under Mitakshara Law, possession of property is not necessary requisite for constitution of a joint family, though where persons live together, joint in food and worship, it is difficult to conceive of their possessing no property whatever, such as, at least, ordinary household articles which they would enjoy in common.