After the government of Alba was thus transferred to Numitor, Romulus and Remus were seized with the desire of building a city in the locality where they had been exposed. There was the superfluous population of the Alban and Latin towns, to these were added the shepherds: it was natural to hope that with all these Alba would be small and Lavinium small in comparison with the city which was to be founded. These pleasant anticipations were disturbed by the ancestral curse –ambition– which led to a deplorable quarrel over what was at first a trivial matter. As they were twins and no claim to precedence could be based on seniority, they decided to consult the tutelary deities of the place by means of augury as to who was to give his name to the new city, and who was to rule it after it had been founded. Romulus accordingly selected the Palatine as his station for observation, Remus the Aventine.
Remus is said to have been the first to receive an omen: six vultures appeared to him. The augury had just been announced to Romulus when double the number appeared to him. Each was saluted as king by his own party. The one side based their claim on the priority of the appearance, the other on the number of the birds. Then followed an angry altercation; heated passions led to bloodshed; in the tumult Remus was killed. The more common report is that Remus contemptuously jumped over the newly raised walls and was forthwith killed by the enraged Romulus, who exclaimed, “So shall it be henceforth with every one who leaps over my walls.“ Romulus thus became sole ruler, and the city was called after him, its founder.
The Roman State had now become so strong that it was a match for any of its neighbours in war, but its greatness threatened to last for only one generation, since through the absence of women there was no hope of offspring, and there was no right of intermarriage with their neighbours. Acting on the advice of the senate, Romulus sent envoys amongst the surrounding nations to ask for alliance and the right of intermarriage on behalf of his new community. It was represented that cities, like everything else, sprung from the humblest beginnings, and those who were helped on by their own courage and the favour of heaven won for themselves great power and great renown. As to the origin of Rome, it was well known that whilst it had received divine assistance, courage and self–reliance were not wanting. There should, therefore, be no reluctance for men to mingle their blood with their fellow–men. Nowhere did the envoys meet with a favourable reception…
To secure a favourable place and time for such an attempt, Romulus, disguising his resentment, made elaborate preparations for the celebration of games in honour of “Equestrian Neptune,” which he called “the Consualia.” He ordered public notice of the spectacle to be given amongst the adjoining cities, and his people supported him in making the celebration as magnificent as their knowledge and resources allowed, so that expectations were raised to the highest pitch. There was a great gathering; people were eager to see the new City, all their nearest neighbours–the people of Caenina, Antemnae, and Crustumerium–were there, and the whole Sabine population came, with their wives and families. They were invited to accept hospitality at the different houses, and after examining the situation of the City, its walls and the large number of dwelling–houses it included, they were astonished at the rapidity with which the Roman State had grown.
When the hour for the games had come, and their eyes and minds were alike riveted on the spectacle before them, the preconcerted signal was given and the Roman youth dashed in all directions to carry off the maidens who were present. The larger part were carried off indiscriminately, but some particularly beautiful girls who had been marked out for the leading patricians were carried to their houses by plebeians told off for the task…
Alarm and consternation broke up the games, and the parents of the maidens fled, distracted with grief, uttering bitter reproaches on the violators of the laws of hospitality and appealing to the god to whose solemn games they had come, only to be the victims of impious perfidy.
The abducted maidens were quite as despondent and indignant. Romulus, however, went round in person, and pointed out to them that it was all owing to the pride of their parents in denying right of intermarriage to their neighbours. They would live in honourable wedlock, and share all their property and civil rights, and—dearest of all to human nature—would be the mothers of freemen. He begged them to lay aside their feelings of resentment and give their affections to those whom fortune had made masters of their persons. An injury had often led to reconciliation and love; they would find their husbands all the more affectionate, because each would do his utmost, so far as in him lay, to make up for the loss of parents and country. These arguments were reinforced by the endearments of their husbands, who excused their conduct by pleading the irresistible force of their passion—a plea effective beyond all others in appealing to a woman’s nature.
(Livy, Ab Urbe Condita, text from the Perseus Digital Library)