The king, whose sovereignty over the burgesses was in truth ultimately dependent on the good-will of those obeying, must have welcomed the means of forming out of his own -proteges- essentially dependent on him a body bound to him by closer ties.
Plebs Thus there grew up by the side of the burgesses a second community in Rome: out of the clients arose the Plebs.

This change of name is significant.

In law there was no difference between the client and the plebeian, the "dependent" and the "man of the multitude;" but in fact there was a very important one, for the former term brought into prominence the relation of dependence on a member of the politically privileged class; the latter suggested merely the want of political rights.

As the feeling of special dependence diminished, that of political inferiority forced itself on the thoughts of the free -- metoeci--; and it was only the sovereignty of the king ruling equally over all that prevented the outbreak of political conflict between the privileged and the non-privileged classes.
The Servian Constitution The first step, however, towards the amalgamation of the two portions of the people scarcely took place in the revolutionary way which their antagonism appeared to foreshadow.

The reform of the constitution, which bears the name of king Servius Tullius, is indeed, as to its historical origin, involved in the same darkness with all the events of a period respecting which we learn whatever we know not by means of historical tradition, but solely by means of inference from the institutions of later times.