Classification of Persons
The Roman law distinguished three kinds of personal status, or degree of legal capacity, and classified human beings with respect thereto as follows:
(1) The status of Freedom (libertatis) according to which persons were either free (liberi) or slaves (servi). Free persons were either freeborn (ingenui) or freedmen (libertini).
(2) The status of Citizenship (civitatis), according to which freemen were either Roman citizens (cives) or aliens (peregrini).
(3) The status of Family (familiae), according to which citizens were either independent (sui juris) or subject to the authority of another (alieni juris).
Among the Romans legal capacity was the exception, as among modern nations it is the rule. Even free persons enjoying the status of citizens were usually in some condition of subordination or dependence in respect to their family relations. The only person fully independent was the head of a family, or paterfamilias, above the age of twenty-five years.
There were several distinct states of subordination or dependence. Besides slavery, which was a state of complete subordination, there was a condition of quasi-slavery known as mancipipium.
Married women were under the marital power (manus) of their husband, children were under the paternal power (potestas) of their fathers. Unmarried women and orphan children under the age of puberty were under guardianship (tutela mulierum and tutela impuberum). Orphans from the age of puberty to the age of twenty-five years, lunatics and spendthrifts were under another form of guardianship (cura).
Of these instances of the power of one person over another mancipium, manus, and tutela mulierum were obsolete in the time of Justinian.