I Am a Traditional Catholic
The following text by Leo XIII quite soundly denounces every brand of socialist and their aim.
Pope Leo XIII
You understand, venerable brethren, that 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.
Leo XIII, Encyclical Quod apostolici muneris, of April 20, 1884
Pope Leo XIII
You understand, venerable brethren, that 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.
Leo XIII, Encyclical Quod apostolici muneris, of April 20, 1884
80-89, M