Thus the ancient city was transformed by degrees. In the beginning it was an association of some hundred chiefs of families. Later the number of citi… - Numa Denis Fustel de Coulanges

The causes of ... [the city's] destruction may be reduced to two. One was the change that took place in the course of time in ideas, resulting from the natural development of the human mind, and which, in effacing ancient beliefs, at the same time caused the social edifice to crumble, which these beliefs had built, and could alone sustain. The other was a class of men who found themselves placed outside this city organization, and who suffered from it. These men had an interest in destroying it, and made war upon it continually. When, therefore, the beliefs, on which this social regime was founded, became weakened, and the interests of the majority of men were at war with it, the system fell. No city escaped this law of transformation; Sparta no more than Athens, Rome no more than Greece. We have seen that the men of Greece and those of Italy had originally the same beliefs, and that the same series of institutions was developed among both; and we shall now see that all these cities passed through similar revolutions.

This right of citizenship then became precious, first, because it was complete, and secondly, because it was a privilege. Through it a man figured in the comitia of the most powerful city of Italy; he might be consul and commander of the legions. There was also the means of satisfying more modest ambitions; thanks to this right, one might ally himself, by marriage, to a Roman family; or he might take up his abode at Rome, and become a proprietor there; or he might carry on trade in Rome, which had already become one of the first commercial towns in the world. One might enter the company of farmers of the revenue, —that is to say, take a part in the enormous profits which accrued from the collection of the revenue, or from speculations in the lauds of the ager publicus. Wherever one lived, he was effectually protected; he escaped the authority of the municipal magistrate and was sheltered from the caprices of the Roman magistrates themselves. By being a citizen of Rome, a man gained honor, wealth, and security. The Latins, therefore, became eager to obtain this title, and used all sorts of means to acquire it.

We should not lose sight of the excessive difficulty which, in primitive times, opposed the foundation of regular societies. The social tie was not easy to establish between those human beings who were so diverse, so free, so inconstant. To bring them under the rules of a community, to institute commandments and insure obedience, to cause passion to give way to reason, and individual right: to public right, there certainly was something necessary, stronger than material force, more respectable than interest, surer than a philosophical theory, more unchangeable than a convention; something that should dwell equally in all hearts, and should be all-powerful there. This power was a belief. Nothing has more power over the soul. A belief is the work of our mind, but we are not on that account free to modify it at will. It is our own creation, but we do not know it. It is human, and we believe it a god. It is the effect of our power, and is stronger than we are. It is in us; it does not quit us: it speaks to us at every moment. If it tells us to obey, we obey; if it traces duties for us, we submit. Man may, indeed, subdue nature, but he is subdued by his own thoughts.