2. We know, however, that a revolutionary uprising -- save where there is manifest, long-standing tyranny which would do great damage to fundamental personal rights and dangerous harm to the common good of the country -- produces new injustices, throws more elements out of balance and brings on new disasters. A real evil should not be fought against at the cost of greater misery (Papal Encyclical, Populorum Progressio, 26 Mar 1967).