It was fired to action by a new rivalry. The naval supremacy of Britain was growing into an empire of the sea; and not only was such an empire in itself a challenge to France, but it was fatal to the aspirations after a colonial dominion, after aggrandizement in America, and the upbuilding of a French power in the East, which were already vaguely stirring in the breasts of her statesmen. And to this new rivalry was added the temptation of a new chance of success. On the Continent the mightiest foe of France had ever been the House of Austria; but that House was now paralyzed by a question of succession. It was almost certain that the quarrels which must follow the death of the Emperor would break the strength of Germany, and it was probable that they might be so managed as to destroy for ever that of the House of Hapsburg. While the main obstacle to her ambition was thus weakened or removed, France won a new and invaluable aid to it in the friendship of Spain. Accident had hindered for a while the realization of the forebodings which led Marlborough and Somers so fiercely to oppose a recognition of the union of the two countries under the same royal house in the Peace of Utrecht. The age and death of Lewis the Fourteenth, the minority of his successor, the hostility between Philip of Spain and the Duke of Orleans, the personal quarrel between the two Crowns which broke out after the Duke's death, had long held the Bourbon powers apart. France had in fact been thrown on the alliance of England, and had been forced to play a chief part in opposing Spain and in maintaining the European settlement. But at the death of George the First this temporary severance was already passing away. The birth of children to Lewis the Fifteenth settled all questions of succession; and no obstacle remained to hinder their family sympathies from uniting the Bourbon Courts in a common action. The boast of Lewis the Fourteenth was at last fulfilled. In the mighty struggle for supremacy which France carried on from the fall of Walpole to the Peace of Paris her strength was doubled by the fact that there were "no Pyrenees." [Sidenote: The Family Compact.]