Adrien Albert Marie, Comte de Mun, was a French political figure, nobleman, journalist, social reformer, and reactionary of the nineteenth century. Born into a noble family de Mun joined the French army at a young age serving during the French conquest of Algeria, the Franco-Prussian War and the suppression of the Paris Commune. A devout Catholic, de Mun became interested in Catholic Social Teaching while he was a prisoner of war in Germany.

The French Third Republic was the system of government adopted in France from 4 September 1870, when the Second French Empire collapsed during the Franco-Prussian War, until 10 July 1940, after the Fall of France during World War II led to the formation of the Vichy government.