99 Sad to say, this vast circle comprises very many people who profess no religion at all. Many, too, subscribe to atheism in one of its many different forms. They parade their godlessness openly, asserting its claims in education and politics, in the foolish and fatal belief that they are emancipating mankind from false and outworn notions about life and the world and substituting a view that is scientific and up-to-date.
Source: Ecclesiam Suam (Vatican.va)