Liberalism is a Sin (Spanish: El liberalismo es pecado) is a controversial book written by Roman Catholic priest Félix Sardà y Salvany in 1884, which became a rallying point for conservative political movements such as Integrism and Carlism.
Defunct Salvany believed that liberalism is the "burning issue of our century" : it is the "radical and absolute negation of the sovereignty of God".
The pamphlet was written in a period that was favourable to anti-liberalism and Catholic integralism in the history of Spain: the First Spanish Republic had been overthrown in 1874 and the Bourbon dynasty had been restored to the throne.
[1] Historian Noel Valis points out that "During the Spanish Civil War, in a propaganda pamphlet, the Republican supporter Langdon-Davies pointed out to English Catholics that the same sentiment (liberalism is a sin) could be found in a popular catechism by Angel Maria de Arcos.
"[2] A translation of Salvany's El liberalismo es pecado into English was created by Condé B. Pallen, entitled What Is Liberalism?.