Evangelii Nuntiandi §36

36. The Church considers it to be undoubtedly important to build up structures which are more human, more just, more respectful of the rights of the person and less oppressive and less enslaving, but she is conscious that the best structures and the most idealized systems soon become inhuman if the inhuman inclinations of the human heart are not made wholesome, if those who live in these structures or who rule them do not undergo a conversion of heart and of outlook.