Gibbon, the gift that just keeps giving

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.