*The friction between the Senate and the princeps.* It might be thought that owing to the gradual admission to the Senate of the nominees of the princeps that harmony would have been established between the two administrative heads of the state. But although this new nobility was thoroughly loyal to the principate, they proved just as tenacious of the rights of the Senate as the descendants of the older nobility who preserved the tradition of senatorial rule. Augustus and Tiberius endeavored to govern in concord with the Senate by organizing an advisory council appointed from the Senate, but their successors abandoned the practice. The friction between the princeps and the Senate was due in part to the realization that it was from the senatorial order that rivals might arise and in part to the fact that those emperors who did not interpret their position, as did Augustus, in the light of a magistracy responsible to the Senate, were bound to regard the Senate's powers as restrictions upon their own freedom of action, and as an unnecessary complication of the administration. The chief services of the Senate were to provide a head for the government when the principate was vacant, and to furnish the only means for the expression of opinion with regard to the character of the administration of the individual emperors. The spontaneous deification or the _damnatio memoriae_ of a deceased princeps was not without weight, for it expressed the opinion of the most influential class in the state.
While the Senate as a body was thus stripped of its power, the senatorial order remained a powerful class. Originally embracing the chief landholders of Italy, it came to include those of the whole empire. Collectively the senators lost in influence, but individually they gained. By the end of the second century the senatorial order had acquired an hereditary title, that of _clarissimus_ (most noble), indicative of their rank.
*The first steps.* The necessary counterpart to the assumption of administrative duties by the princeps was the development of an imperial civil service, the officials of which were nominated by the princeps, and promoted or removed at his pleasure. In this Augustus had taken the first steps by the establishment of equestrian procuratorships and prefectures, and the opening up of an equestrian career, but the number of these posts greatly increased with the extension of the administrative sphere of the princeps at the expense of the Senate. The idea of conducting the government through various departments manned by permanent salaried officials was absolutely foreign to the Roman republic, which only employed such servants for clerical positions of minor importance in Rome. However, the chaotic conditions which had resulted from the republican system showed the need of a change, and the concentration of a large share of the administration in the hands of the princeps both required and gave the opportunity for the development of an organized civil service. This development was unquestionably stimulated and influenced by the incorporation in the Roman empire of the kingdom of Egypt, which possessed a highly organized bureaucratic system that continued to function unchanged in its essential characteristics.