To speak of social sin means in the first place to recognize that, by virtue of human solidarity which is as mysterious and intangible as it is real and concrete, each individual’s sin in some way affects others. This is the other aspect of that solidarity which on the religious level is developed in the profound and magnificent mystery of the communion of saints, thanks to which it has been possible to say that “every soul that rises above itself, raises up the world.” To this law of ascent there