In the cool shade of retirement, we may easily devise imaginary forms of government, in which the sceptre shall be constantly bestowed on the most worthy by the free and incorrupt suffrage of the whole community. Experience overturns these airy fabrics, and teaches us that in a large society the election of a monarch can never devolve to the wisest or to the most numerous part of the people. 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. Justice, humanity, or political wisdom, are qualities they are too little acquainted with in themselves to appreciate them in others. Valour will acquire their esteem, and liberality will purchase their suffrage; but the first of these merits is often lodged in the most savage breasts; the latter can only exert itself at the expense of the public; and both may be turned against the possessor of the throne by the ambition of a rival.

Gibbon's Decline and Fall is always a wonderful read.

In the second year of the reign of Valentinian and Valens, on the morning of the twenty first day of July, the greatest part of the Roman world was shaken by a violent and destructive earthquake ... This calamity, the report of which was magnified from one province to another, astonished and terrified the subjects of Rome; and their affrighted imagination enlarged the real extent of a momentary evil. They recollected the preceding earthquakes, which had subverted the cities of Palestine and Bithynia: they considered these alarming strokes as the prelude only of still more dreadful calamities, and their fearful vanity was disposed to confound the symptoms of a declining empire, and a sinking world. It was the fashion of the times, to attribute every remarkable event to the particular will of the Deity; the alterations of nature were connected, by an invisible chain, with the moral and metaphysical opinions of the human mind; and the most sagacious divines could distinguish, according to the colour of their respective prejudices, that the establishment of heresy tended to produce an earthquake; or that a deluge was the inevitable consequence of the progress of sin and error. Without presuming to discuss the truth or propriety of these lofty speculations, the historian may content himself with an observation, which seems to be justified by experience, that man has much more to fear from the passions of his fellow-creatures, than from the convulsions of the elements.