Albert was born at Lumigny-Nesles-Ormeaux, Seine-et-Marne, son of the marquess de Mun. He became the brother in law of the Duke of Ursel when is sister Antonine de Mun left for Belgium. He entered the French Army, saw much service in Algeria, and took part in the fighting around Metz in 1870. On the surrender of Metz, he was sent as a prisoner of war to Aachen, where he met René de La Tour du Pin. They both were determined to respond to the dilemma of the working class upon their release from prison. The following year they organized a Catholic Workers' club, under the name "L'Oeuvre des Cercles Catholiques d'Ouvriers", at the request of Maurice Maignen. The clubs spread quickly throughout France. These "circles" or clubs brought together the wealthy and the workers from a given locale for prayer, socializing, and hearing lectures by members of the aristocracy. He also assisted in the capture of Paris from the Paris Commune. A fervent Roman Catholic, Albert devoted himself to advocating Social Catholicism. His attacks on Third French Republic's social policy ultimately provoked a prohibition from the Minister of War. He thereupon resigned his commission, and in the following February stood as Royalist and Catholic candidate for Pontivy. The influence of the Church was exerted to secure his election, and, during the proceedings, he was awarded the Order of Saint Gregory the Great by Pope Pius IX. He won the next elections for the same area, but the result was declared invalid. De Mun was re-elected, however, in the following August, and for many years was the most conspicuous leader of the anti-Republican party. "We form", he said on one occasion, "the irreconcilable Counter-Revolution". He was also a resolute opponent of Socialism: "Socialism is logical Revolution and we are Counter-Revolution. There is nothing in common between us." He was a prominent Anti-Dreyfusard as well as a committed antisemite who believed Jews were plotting an international conspiracy and casually referred to them as youtres.
Later years
As far back as 1878 he had declared himself opposed to universal suffrage, a declaration that lost him his seat from 1879 to 1881. He spoke strongly against the expulsion of the French princes, and it was chiefly through his influence that the support of the Royalist party was given to Georges Boulanger. But as a faithful Catholic, he obeyed the modernising encyclical of 1891, Rerum novarum, and declared his readiness to rally to a Republican government, provided that it respected religion. In the following January he received from Leo XIII a letter commending his action, and encouraging him in his social reforms. He was defeated at the general election of that year, but in 1894 was elected in Finistère. In 1897 he succeeded Jules Simon as a member of the Académie française, owing to the quality and eloquence of his speeches, which, with a few pamphlets, form the bulk of his published work. In Ma vocation sociale he wrote an explanation and justification of his career.
