Catholicism gave the following to Western Civilization: The music notation system, double entry book keeping, champagne, Mendelian genetics, Copernican astronomy, the printing press, the hospital, and the university.Readers are invited to take issue with any of the above. For a start, the musical notation system is dreadful, as anyone who has ever had to deal with all those notes above and below the stave will attest. Double entry book-keeping was invented by merchants in 14th Century Florence, who may have been Catholics but then so was everybody. The Church had more than a few issues with the heliocentric model, particularly when Galileo got hold of it. Whatever involvement the Church had with the invention of the printing press they probably regretted: it led to Protestants and the Enlightenment. The university caused similar woes.
Readers are also welcome to add their own favourite Catholic innovations to the list. I will start the list with Fascism. Anyone who has ever wondered why Fascism was strongest in the Catholic parts of Europe is invited to read Isaiah Berlin's Joseph de Maistre and the Origins of Fascism from The Crooked Timber of Humanity.
Lucyna at NZ Conservative has a different interpretation. She blames the Third Reich on the gays, having read a book called The Pink Swastika.