This definition of liberalism encompasses the poisonous fruits of the Enlightenment: Jacobinism, Marxism, Nihilism, socialism and communism:
Pope Pius XI, QUADRAGESIMO ANNO, 1931
“Let all remember that Liberalism is the father of this Socialism that is pervading morality and culture and that Bolshevism will be its heir.”
Pope Leo XIII, QUOD APOSTOLICI MUNERIS, 1878:
“We speak of that sect of men who, under various and almost barbarous names, are called socialists, communists, or nihilists, and who, spread over all the world, and bound together by the closest ties in a wicked confederacy, no longer seek the shelter of secret meetings, but, openly and boldly marching forth in the light of day, strive to bring to a head what they have long been planning—the overthrow of all civil society whatsoever . . .”
“They leave nothing untouched or whole which by both human and divine laws has been wisely decreed for the health and beauty of life. They refuse obedience to the higher powers, to whom, according to the admonition of the Apostle, every soul ought to be subject, and who derive the right of governing from God; and they proclaim the absolute equality of all men in rights and duties. They debase the natural union of man and woman, which is held sacred even among barbarous peoples . . .”