Primogeniture is a legal and social system where the firstborn child inherits the entire estate or the majority of the family's wealth. This practice has been common in many cultures throughout history, particularly among the nobility and aristocracy. It ensures that family lands and titles remain intact and are not divided among multiple heirs. In societies that follow primogeniture, younger siblings often receive little to no inheritance, which can lead to social and economic challenges. This system contrasts with other inheritance practices, such as partible inheritance, where wealth is divided among all children, promoting a more equitable distribution of family resources.