This short book describes the negative effects exerted by Catholicism on the large majority of Catholics. It is critically focused on such issues as: papal infallibility; believing in miracles; the imposition of rules that cannot be followed (condemnation of any sexual act not directed to procreation); easy forgiveness; the exclusion of women; the cult of Saints as "protectors"; the ostentation of power and richness; the pursuing of pseudo-values, such as chastity; the undue interference in the sphere of politics. In the two final chapters, a general comment is given.