5 Kingdoms do not rise to supremacy through merit, but are varied by chance. Empire was formerly held by both Assyrians and Medes and Persians; and we know, too, that both Greeks and Egyptians have had dominion. Thus, in the varying vicissitudes of power, the period of empire has also come to the Romans as to the others. But if you recur to its origin, you must needs blush. A people is collected together from profligates and criminals, and by founding an asylum, impunity for crimes makes the number great; and that their king himself may have a superiority in crime, Romulus becomes a fratricide; and in order to promote marriage, he makes a beginning of that affair of concord by discords.
They steal, they do violence, they deceive in order to increase the population of the state; their marriage consists of the broken covenants of hospitality and cruel wars with their fathers-in-law. The consulship, moreover, is the highest degree in Roman honours, yet we see that the consulship began even as did the kingdom. Brutus puts his sons to death, that the commendation of his dignity may increase by the approval of his wickedness. The Roman kingdom, therefore, did not grow from the sanctities of religion, nor from auspices and auguries, but it keeps its appointed time within a definite limit.
Moreover, Regulus observed the auspices, yet was taken prisoner; and Mancinus observed their religious obligation, yet was sent under the yoke. Paulus had chickens that fed, and yet he was slain at Cannae. Caius Caesar despised the auguries and auspices that were opposed to his sending ships before the winter to Africa; yet so much the more easily he both sailed and conquered.
Source: The Treatises of Cyprian (New Advent)