The obvious definition of a monarchy seems to be that of a state, in which a single person, by whatsoever name he may be distinguished, is entrusted with the execution of the laws, the management of the revenue, and the command of the army. But, unless public liberty is protected by intrepid and vigilant guardians, the authority of so formidable a magistrate will soon degenerate into despotism. The influence of the clergy, in an age of superstition, might be usefully employed to assert the rights of mankind; but so intimate is the connection between the throne and the altar, that the banner of the church has very seldom been seen on the side of the people. A martial nobility and stubborn commons, possessed of arms, tenacious of property, and collected into constitutional assemblies, form the only balance capable of preserving a free constitution against enterprises of an aspiring prince.
If the empire had been afflicted by any recent calamity, by a plague, a famine, or an unsuccessful war; if the Tiber had, or if the Nile had not, risen beyond its banks; if the earth had shaken, or if the temperate order of the seasons had been interrupted, the superstitious Pagans were convinced that the crimes and the impiety of the Christians, who were spared by the excessive lenity of the government, had at length provoked the divine justice.
The army is the only order of men sufficiently united to concur in the same sentiments, and powerful enough to impose them on the rest of their fellow-citizens; but the temper of soldiers, habituated at once to violence and to slavery, renders them very unfit guardians of a legal, or even a civil constitution.
Augustus was sensible that mankind is governed by names; nor was he deceived in his expectation, that the senate and the people would submit to slavery, provided they were respectfully assured that they still enjoyed their ancient freedoms.