Large-scale warfare resumed with the War of the Austrian Succession (1740–1748). But alliance with the traditional Habsburg enemy (the "Diplomatic Revolution" of 1756) against the rising power of Britain and Prussia led to costly failure in the Seven Years' War (1756–63) and the loss of France's North American colonies. On the whole, the 18th century saw growing discontent with the monarchy and the established order. Louis XV was a highly unpopular king for his sexual excesses, overall weakness, and for losing Canada to the British. A strong ruler like Louis XIV could enhance the position of the monarchy, while Louis XV weakened it. The writings of the philosophes such as Voltaire were a clear sign of discontent, but the king chose to ignore them. He died of smallpox in 1774, and the French people shed few tears at his passing. While France had not yet experienced the Industrial Revolution that was beginning in Britain, the rising middle class of the cities felt increasingly frustrated with a system and rulers that seemed silly, frivolous, aloof, and antiquated, even if true feudalism no longer existed in France. Upon Louis XV's death, his grandson Louis XVI became king. Initially popular, he too came to be widely detested by the 1780s. He was married to an Austrian archduchess, Marie Antoinette. French intervention in the American War of Independence was also very expensive. With the country deeply in debt, Louis XVI permitted the radical reforms of Turgot and Malesherbes, but noble disaffection led to Turgot's dismissal and Malesherbes' resignation in 1776. They were replaced by Jacques Necker. Necker had resigned in 1781 to be replaced by Calonne and Brienne, before being restored in 1788. A harsh winter that year led to widespread food shortages, and by then France was a powder keg ready to explode. On the eve of the French Revolution of July 1789, France was in a profound institutional and financial crisis, but the ideas of the Enlightenment had begun to permeate the educated classes of society. Limited monarchy On September 3, 1791, the absolute monarchy which had governed France for 948 years was forced to limit its power and become a provisional constitutional monarchy. However, this too would not last very long and on September 21, 1792, the French monarchy was effectively abolished by the proclamation of the French First Republic. The role of the King in France was finally ended with